text:
Talk:Incheon International Airport

Haneda & Narita = Tokyo
Who keeps leaving harassing messages regarding these changes? Both airports serve Tokyo- do not list separately!173.63.189.183 (talk) 09:40, 16 September 2011 (UTC)
 * Please abide by prescribed formats listed at WP:AIRPORT-CONTENT. We do not combine airports. If you have any issues, please bring it up there in Wikiproject Talk. 14:11, 16 September 2011 (UTC)

East Asia Airlines
How is East Asia Airlines going to fly to Busan? It's a Hong Kong based company. Please verify this claim.72.80.239.215 (talk) 06:40, 15 January 2011 (UTC)

There were never shuttle flights between Gimpo and Vladivostok! Please stop reverting it back with false info. Thank you — Preceding unsigned comment added by 108.35.21.172 (talk) 10:12, 26 April 2022 (UTC)

1983
In 1983, a plane of Korean Air going to Seoul was bombed after accidentally invading Russian airspace and ignoring Russian pilots' warnings.

At that time, Incheon International Airport didn't exist. soax 13:28 Jan 15, 2003 (UTC)

List
I don't know where the passenger figures in the article are coming from, but ACI certainly disagrees:. In 2003, Asia's top 5 were HND, BKK, HKG, NRT and SIN. Jpatokal 16:49, 6 Nov 2004 (UTC)

Yeah, but an article that came out in the Herald Tribune two weeks ago listed the top Asian international airports in the following order: Hong Kong+Changi+Incheon+Narita+Bangkok.

Images
I've added new images to replace the ones I put up several months ago, since the initial photgraphs were put up without permission from their copyright holder. I took the new photos myself, so there should be no more problems about copyright and such.

Flights to Pyongyang
Pyongyang is approximately only 130-140 miles north of the airport, so why aren't there any flights to and from there?
 * Because Pyongyang is in North Korea and technically South Korea and North Korea are still at war. See Korean War. However, for the past few years ministers from both countries have been meeting regularly and are working towards reducing tensions between them and to reopen communications, travel, etc. Lets hope all wars end soon and people realize that life is short and should be lived happily instead of fighting over things all the time. sikander 01:34, 4 January 2006 (UTC)

Finnair
Where does the information concerning Finnair launching Incheon flights in 2007 come from? Yes, it's being rumored, but nothing is official yet.

 * It's official as of 26 June 2007. Please refer to the official site of the carrier. Also, this is the only case confirmed among those new-comers rumours.--59.15.101.172 05:24, 22 October 2007 (UTC)

Past Carriers
Someone is constantly putting a list of past carriers of Gimpo airport (the other Seoul airport, now a domestic airport, except for Tokyo flights). I believe that it is irrelevant to the current article, which is for Incheon airport. What's the rationale for the list? Thoughts anyone? Elektrik Blue 82 07:32, 9 June 2006 (UTC)

 * British once flew to Incheon a few times due to SARS. But I agree to you that British can NOT be considered as a past carrier. Well, isn't it much better to remove the whole section?--59.15.101.172 06:36, 22 October 2007 (UTC)

Best airport
In paragraph 3,
 * It was recently voted the world's best airport in service and quality by the IATA.

I can't find a reference to this on IATA's site. Perhaps the writer meant ACI instead? --69.157.124.140 23:12, 20 June 2006 (UTC)

Just looked it up....This is one article, there are more. "....2nd IATA/ACI's AETRA Survey revealed IIA as the "Best Airport Worldwide,"a kind of overall ranking category on March 7 just a few ...." Excerpt from http://www.newsworld.co.kr/cont/0603/46.htm

Official airport for 2014 olympics
states that the Yangyang International Airport will be upgraded for transportation to and from the Olympics.

Charter flights
I've noticed that some disagree that charter flights being listed on this page. Let me point out that I have only listed regular charter flights. These flights are regularly scheduled. It would be impossible to list those that occur randomly. I believe that this information should be on here, as it is on many other airport pages (at least 10). If you believe that it shouldn't be here, I won't add it again. —Preceding unsigned comment added by 72.80.186.114 (talk • contribs)

 * They may be regularly scheduled, but the fact that regular passengers CANNOT book these flights is the reason why these cannot be listed here. There may be a regular charter flight from ICN to FNJ, but still a civilian cannot book this and fly the route. That is why we do not list these here. The lists of the destinations are meant to be a guide to regular passengers on where the airlines fly to. It just happens that two carriers are being chartered frequently to a point that it is scheduled. Elektrik Blue 82 18:47, 30 August 2006 (UTC)

Understood. I'll help by removing them from other airport pages also. It's just that other sysops keeps reverting it back to a version with that information. I'm not saying that I agree with you, I'm just saying that I won't question your decision. Unlike you, I don't believe that wikipedia airport pages to be meant as a guide for regular passengers. I see it as a page for information like a printed encyclopedia. As such I believe that it should include those information. Anyways, I won't add those information again. —Preceding unsigned comment added by 72.80.186.114 (talk • contribs)

 * If you really think that it is noteworthy to include the regular charters in the page, then I would suggest you can insert a sentence or two about them in the main text. However, giving them a separate sub-heading and listing them doesn't seem a good idea to me, because that somehow gives them the same status as the regular scheduled flights. Elektrik Blue 82 12:09, 1 September 2006 (UTC)

 * Why isn't Calgary listed????????????

Future Airlines
I had at one time confirmed everyone of those future airlines, but since it has now been deleting on accusations that it is mere speculation, I've decided to hunt down all the reference sources once again whenever I have time.

 * Air Sahara (http://www.allair.org/air-sahara/) States that flights to seoul is now planned.
 * Qantas (http://www.channelnewsasia.com/stories/afp_asiapacific_business/view/227988/1/.html) Temporary flights during new year

 * These announcements do not come from the airlines themselves. Even the Qantas seasonal flights do not have a start date. Once you find an announcement from the airlines' website, then you're free to list them. Elektrik Blue 82 13:29, 12 September 2006 (UTC)

Asia's sixth busiest airport?
http://en.wikipedia.org/wiki/World%27s_busiest_airports_by_passenger_traffic

By passenger traffic, Incheon Interntational Airport is obviously not one of the six busiest airports in Asia, which are Tokyo International Airport (1), Beijing Capital International Airport (2), Hong Kong International Airport (3), Singapore Changi Airport(4), Narita International Airport(5), Soekarno-Hatta International Airport (6). —The preceding unsigned comment was added by 222.166.160.64 (talk) 16:36, 15 January 2007 (UTC).
 * You need a non-Wiki source. (Wikimachine 01:09, 16 January 2007 (UTC))
 * Also, that's by passenger traffic, not by total traffic movements. (72.80.186.244 02:43, 24 January 2007 (UTC))

Cargo Airlines
Some of the cargo airlines Marcusaffleck recently deleted off the list included cargo airlines that do fly to RKSI (ICN). I did a quick search to confirm that only 7 out of the total 20 deleted were airlines that didn't fly to RKSI. I have readded those that do seem to offer services to RKSI. This was a quick search. I may have overseen certain things. If I did, please excuse me.

Airline codes are in ICAO.

ANA http://www.ana.co.jp/cargo/schedule/pdf/data/013_e.pdf

GTI http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=5Y

NVI http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=-

CPA http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=CX

ELY http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=LY

FKS http://www.payloadasia.com/pastnews-16-s-supplement-5-2007-PayloadAsia.html

GCO http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=GR

CKS http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=K4

KRI http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=K9

MAS http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=MH

SQC http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=SQ

SOO http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=9S

TDX http://www.airport.or.kr/airport/airline/airlineView.iia?currentPage=0&searchOption=&searchWord=&langGubun=E&air_iata=WI

71.183.96.53 11:02, 25 August 2007 (UTC)

PUS-ICN on LH
Why is suddenly Busan listed as a destination for Lufthansa from Incheon??????? Still, They can't sell tickets for that routes....should SHOULD NOTbe listed as a destination!!!!! Bucs2004 00:09, 23 October 2007 (UTC)

 * While I fully understand the Cabotage matter you claimed, I don't think that we have to exclude those domestic flights (by foreign carriers) from the list, as "destinations" does not necessarily mean that the carrier sells tickets. Let's take a look at another example. Because of lack of the 5th freedom, those flights cannot be sold: Incheon-Narita (Iran, Mongolian) and Incheon-Kansai (Qatar). Those routes are listed on the 'airlines and destinations' section with no doubt. Is it so much different whether the flight is domestic or international? (or 5th or 8th freedom?) --59.15.101.172 01:32, 23 October 2007 (UTC)

Aeromexico a future airline?
As a Korean, I've never seen any article about AM to begin a Mexico-Korea service. All known are Tokyo and Shanghai. Can anybody provide a source? 59.15.101.172 (talk) 08:24, 13 December 2007 (UTC)

Yakutia Airlines
Althought Yakutia Airlines (R3) started Yakutsk-Incheon service from Oct 2007, this is not a scheduled service yet, and is still due to approval by Korean authority. Until then, R3 will remain as a charter operation in ICN. (I know the list has a few carriers who just do charters, but remember why CS is not on the list.) 59.15.101.172 (talk) 15:29, 1 February 2008 (UTC)

Incheon Tiger Airways
If you read the article on Incheon Tiger Airways you will see that a potentially power anchor airline is going to set up shop here. How should this information be integrated into the article though? I haven't edited this page yet, because I'm not sure if this information is relevant enough to add. They are not yet operating, so they can't really be placed here yet, can they? Any thoughts? DaronDierkes (talk) 05:35, 14 April 2008 (UTC)
 * Ah, I see there is already a reference. I should read before I speak.  DaronDierkes (talk) 05:38, 14 April 2008 (UTC)

Destination list
I suggest merging about 20% of the destination list back into this article (from Airlines and destinations at Incheon International Airport) and just deleting the rest of that page. Basically keep the destination list in a format similar to almost all the other airport articles. Get rid of the other crap (separate line for every single city with airport name, codes, flags, etc.) DB (talk) 21:55, 27 October 2008 (UTC)
 * I agree with that word for word. Spikydan1 (talk) 20:37, 3 December 2008 (UTC)
 * I agree. The destinations list looks messy and hard to read anyways. Cashier freak (talk) 20:47, 3 December 2008 (UTC)
 * I agree. pikdig (talk) 03:07, 12 January 2009 (UTC)

Orphaned references in Incheon International Airport
I check pages listed in Category:Pages with incorrect ref formatting to try to fix reference errors. One of the things I do is look for content for orphaned references in wikilinked articles. I have found content for some of Incheon International Airport's orphans, the problem is that I found more than one version. I can't determine which (if any) is correct for this article, so I am asking for a sentient editor to look it over and copy the correct ref content into this article.

Reference named "Route Map": From Emirates destinations: Emirates Destinations From Cebu Pacific destinations: Cebu Pacific Air - Route Map From Singapore Airlines destinations:

I apologize if any of the above are effectively identical; I am just a simple computer program, so I can't determine whether minor differences are significant or not. AnomieBOT ⚡ 12:24, 6 March 2013 (UTC)

Seoul's role with China travel
Some Chinese sources I will use later that Tom Chen pointed out: WhisperToMe (talk) 07:21, 22 July 2013 (UTC)
 * "韩亚失事航班一半是中国乘客 价格便宜是诱人因素." (Archive) - Xinhua. July 9, 2013.
 * "韩亚事件折射本土客源流失国内航企“不争气”？." (Archive) Yangcheng Evening News (广东羊城晚报数字媒体有限公司).

Reordering
Ladies and gentlemen, secs 4 thru 6 need reordering and condensing of material between them. Done some. Wishes, Ukrained2012 (talk) 23:53, 11 September 2013 (UTC)

Accidents and incidents
The accident of Asiana flight 214 at San Francisco International Airport should not be listed here as an accident directly related to Incheon International Airport. — Preceding unsigned comment added by Turingskj (talk • contribs) 13:35, 28 October 2013 (UTC)

Blacklisted Links Found on the Main Page
Cyberbot II has detected that page contains external links that have either been globally or locally blacklisted. Links tend to be blacklisted because they have a history of being spammed, or are highly innappropriate for Wikipedia. This, however, doesn't necessarily mean it's spam, or not a good link. If the link is a good link, you may wish to request whitelisting by going to the request page for whitelisting. If you feel the link being caught by the blacklist is a false positive, or no longer needed on the blacklist, you may request the regex be removed or altered at the blacklist request page. If the link is blacklisted globally and you feel the above applies you may request to whitelist it using the before mentioned request page, or request its removal, or alteration, at the request page on meta. When requesting whitelisting, be sure to supply the link to be whitelisted and wrap the link in nowiki tags. The whitelisting process can take its time so once a request has been filled out, you may set the invisible parameter on the tag to true. Please be aware that the bot will replace removed tags, and will remove misplaced tags regularly.

Below is a list of links that were found on the main page:

 * http://www.airport-technology.com/projects/-incheon-international-airport-terminal-seoul/
 * Triggered by  on the local blacklist

If you would like me to provide more information on the talk page, contact User:Cyberpower678 and ask him to program me with more info.

From your friendly hard working bot.— cyberbot II NotifyOnline 13:24, 3 April 2014 (UTC)

✅ This issue has been resolved, and I have therefore removed the tag, if not already done. No further action is necessary.— cyberbot II NotifyOnline 19:20, 9 April 2014 (UTC)

Semi-protected edit request on 12 December 2014
The author or administrator of this page forgot to colour SPAIN in the map of COUNTRIES SERVED BY FLIGHTS FROM INCHEON AIRPORT. As a Spaniard who flies to Korea three times a year it hurted considerably.

Cheers

79.150.110.39 (talk) 15:59, 12 December 2014 (UTC)
 * I saw you edited the image a few days ago. Can you please add Spain? Madrid is in the list of airports served. Stickee (talk) 05:51, 13 December 2014 (UTC)
 * Don’t know how I managed to miss that ✅
 * Pictogram voting wait.svg Already done — {{U|Technical 13}} (e • t • c) 16:10, 13 December 2014 (UTC)

Edit Request
Can someone add Honolulu to the list of Jin Air destinations as the airline will start service on 19 December 2015. Source: http://airlineroute.net/2015/07/13/lj-hnl-dec15/. 97.85.113.113 (talk) 05:27, 13 July 2015 (UTC)

Not done for now: WP:CRYSTAL Bazj (talk) 07:03, 13 July 2015 (UTC)

Edit Request
Can someone add "ends 29 September 2015" to Guam on United Airlines as the airline is ending this route. Source: http://airlineroute.net/2015/07/20/ua-gum-sep15/. 97.85.113.113 (talk) 04:47, 20 July 2015 (UTC)
 * Done! HkCaGu (talk) 05:30, 20 July 2015 (UTC)
 * if it's done then please mark it as done. (see  above) --Jeremyb (talk) 06:08, 20 July 2015 (UTC)

External links modified
Hello fellow Wikipedians,

I have just added archive links to 2 one external links on Incheon International Airport. Please take a moment to review my edit. If necessary, add after the link to keep me from modifying it. Alternatively, you can add to keep me off the page altogether. I made the following changes:
 * Added archive https://web.archive.org/20150701191904/http://wwwdownload.thy.com/kargo/pdf/winter2012_2013.pdf to http://wwwdownload.thy.com/kargo/pdf/winter2012_2013.pdf
 * Added archive https://web.archive.org/20071216113138/http://airportservicequality.ch:80/news to http://airportservicequality.ch/news

When you have finished reviewing my changes, please set the checked parameter below to true to let others know.

Cheers. —cyberbot II  Talk to my owner :Online 06:12, 30 August 2015 (UTC)

Semi-protected edit request on 2 January 2016
Under Airlines and Destinations Please Change Korean Air operated by Hanjin with the Seasonal destination of Athens because Hanjin does not operate this flight, Hanjin Group owns Korean Air and has since 1969, a quick look at either the Korean Air page or Hanjin Group page in Wikipedia will support this. The line above already denotes that Korean Air operates a seasonal flight to Athens. Thank you, and Happy New Year.

Jbirch82 (talk) 22:37, 2 January 2016 (UTC)
 * Done. HkCaGu (talk) 03:09, 3 January 2016 (UTC)

Semi-protected edit request on 4 January 2016
This part of the artice is outdated, the hospital has been built.:

To further upgrade service, Incheon and major Korean logistics firm Hanjin Corporation (parent company of the Korean Flag Carrier, Korean Air) agreed on 10 January 2008 to build a nine-story hospital near the airport. Once construction is complete in 2011, the Yeongjong Medical Centre is expected to serve nearby residents and some of Korea's annual 30,000 medical tourists.

Palmount45 (talk) 21:48, 4 January 2016 (UTC)

Palmount45 (talk) 21:48, 4 January 2016 (UTC)
 * Red information icon with gradient background.svg Not done for now: You're right, it does look outdated. However, do you have any ideas on how specifically we can change the paragraph to be updated? Are there any new reliable sources we can research and draw information from? Regards, Mz7 (talk) 05:34, 9 January 2016 (UTC)

Problems with booking a flight from international to another domestic Korean airport.
There should be something written here about the problems of booking a flight from abroad by booking a flight directly to one of Korea's other city airports. Because both ICN and GMP are listed as separate airports it is nearly impossible to book these flights without paying for a separate ticket.

Say for example you are flying from Calgary (YYC) and wanted to book a round ticket to Gwang-ju (KWJ). If you try to do that online what usually happens is that you get a flight from YYC to YVR; but instead of getting a flight from YVR to ICN and then a flight from GMP to KWJ, you get bounced over to another country such as China or Japan to an airport that serves both YVR and KWJ.

When you call an airline they say that it is not possible as you would need a double open-jaw ticket, something that most non-Korean airlines or flight rewards won't do.
 * "A -> B -> Open Jaw -> C -> D" and the return, "D -> C -> Open Jaw -> B -> A" or in this case,
 * "YYC (YVR) -> ICN -> bus/train -> GMP -> KWJ" and the return, "KWJ -> GMP -> bus/train -> ICN -> YYC (YVR)".

What you are forced to do, if you don't want to transit another country is purchase your ticket to ICN and then a separate ticket from GMP to the other Korean city (which is usually more expensive).

They really need to fix this so that it is more convenient to travel to Korea. --Skippingrock (talk) 05:14, 9 March 2016 (UTC)

External links modified
Hello fellow Wikipedians,

I have just modified 2 external links on Incheon International Airport. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
 * Added archive https://web.archive.org/web/20120324122400/http://www.aci.aero/aci/aci/file/Press%20Releases/2011/PR_01082011_2010_WATR.pdf to http://www.aci.aero/aci/aci/file/Press%20Releases/2011/PR_01082011_2010_WATR.pdf
 * Added archive https://web.archive.org/web/20130803061329/http://www.worldairportawards.com/Awards_2012/Airport2012.htm to http://www.worldairportawards.com/Awards_2012/Airport2012.htm

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

Cheers.— InternetArchiveBot  (Report bug) 02:49, 10 April 2017 (UTC)

External links modified
Hello fellow Wikipedians,

I have just modified one external link on Incheon International Airport. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
 * Added tag to http://medical.incheon.go.kr/open_content/medical.do?act=medicaldetail&lang=en&medicalno=52&medicaldiv=01
 * Added archive https://web.archive.org/web/20141006091534/http://www.lonelyplanet.com/south-korea/gyeonggi-do/yeongjongdo-and-muuido/transport/getting-there-away to http://www.lonelyplanet.com/south-korea/gyeonggi-do/yeongjongdo-and-muuido/transport/getting-there-away

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

Cheers.— InternetArchiveBot  (Report bug) 19:54, 12 November 2017 (UTC)

A Commons file used on this page or its Wikidata item has been nominated for deletion
The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for deletion: Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 08:41, 4 March 2020 (UTC)
 * AREX EMU2000.jpg

A Commons file used on this page or its Wikidata item has been nominated for deletion
The following Wikimedia Commons file used on this page or its Wikidata item has been nominated for deletion: Participate in the deletion discussion at the. —Community Tech bot (talk) 01:07, 3 March 2021 (UTC)
 * ICN-RKSI조감도.png

Commons files used on this page or its Wikidata item have been nominated for deletion
The following Wikimedia Commons files used on this page or its Wikidata item have been nominated for deletion: Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 04:52, 21 April 2022 (UTC)
 * Incheon Airport Terminal 2 - Departure (50310943117).jpg
 * Incheon International Airport (44721041481).jpg
 * Incheon International Airport Terminal 2 Self Bag Drop Counter.JPG
 * Piano at ICN (44113718190).jpg
 * Seoul incheon airport terminal 2.jpg

Entire Topics are Duplicated in the Page
"History" and "Statistics" are notably included in the Page twice. 74.205.149.66 (talk) 10:02, 9 October 2023 (UTC)

title: Talk:Incheon International Airport


text:
Toaplan

Toaplan Co., Ltd. (株式会社東亜プラン) was a Japanese video game developer based in Tokyo responsible for the creation of a wide array of scrolling shooters and other arcade video games. The company was founded in 1979 but its gaming division was established in 1984 by former Orca and Crux employees, who wanted to make games, after both companies declared bankruptcy. Their first shoot 'em up game, Tiger-Heli (1985) on arcades, was a success and helped establish Toaplan as a leading producer of shooting games throughout the 1980s and 1990s that would continue to characterize their output.

Though initially exclusive to arcades, they expanded with the Sega Genesis in 1990. The company ceased development of shoot 'em up projects before declaring bankruptcy in 1994. Several offshoot developers such as Tamsoft, Eighting, CAVE, Gazelle, and Takumi Corporation were formed prior to and after the closure, while former members later joined to other studios such as Bandai Namco Entertainment, Capcom, Square Enix and Taito. Toaplan has since earned recognition from critics, being called one of the greatest and most influential Japanese shoot 'em up developers and "master" of the scrolling shooter genre.

History
Toaplan was established in April 1979 but its gaming division was established by former Orca and Crux members. Performan was created by most of the same team that previously worked on several projects at Orca and Crux before both companies declared bankruptcy,   after which a group of employees from the two gaming divisions would go on to form Toaplan and among them were composers Masahiro Yuge and Tatsuya Uemura.

In 1992, Yoshiyuki Kiyomoto stepped down from his position as CEO at Toaplan, with Taizo Hayashi now serving as the company's president. Toaplan provided consultance and advising to Raizing (now Eighting) during the development of Sorcer Striker, as well as licensing their arcade board to the company, since the president of the latter company previously served as an employee of the former. Snow Bros. 2: With New Elves served as one of the final projects to be developed by Toaplan, as the company ceased development of shoot 'em up games before their closure.

The company declared bankruptcy on March 31, 1994. Its closure led to the formation of several offshoot companies. Prior to Toaplan's closure in 1994, several former employees formed or were involved with multiple companies, many of which were dedicated to arcade shooters:    Tamsoft, Raizing, CAVE, Gazelle, and Takumi (who continued development of Twin Cobra II after Toaplan's closure).

The rights to nearly every Toaplan IP are currently owned by Tatsujin, a Japanese company formed by Yuge. In 2019, Japanese company M2 announced that in 2020 they will release every game by Toaplan (excluding Mahjong Sisters and Enma Daiō) for consoles in Japan. In August 2022, Tatsujin was acquired by Embracer Group for a retro gaming focused operative group. In September 2023, close to Tokyo Game Show 2023, TATSUJIN announced new projects, such as Truxton Extreme, Snow Bros. Wonderland (both games being sequels to their respective series) and Amusement Arcade TOAPLAN, a compilation of 25 Arcade games for smartphones.

Staff
Various individuals have been important figures in the history of Toaplan:

 * Masahiro Yuge – One of the six original team members and frequent composer.    Later worked at Takumi Corporation and Eighting on several projects.
 * Tatsuya Uemura – One of the six original team members and frequent composer.    Later worked at Gazelle and Eighting on several projects.
 * Toshiaki Tomizawa – Music composer for Demon's World, Zero Wing and Vimana.  Co-founder of CAVE.
 * Osamu Ōta – Music composer for Wardner, Rally Bike and Twin Hawk. Producer of Gekirindan at Taito.
 * Toshiaki Ōta – One of the six original team members and head of software development.  Founder of Tamsoft.
 * Naoki Ogiwara – Artist and designer for Truxton and Out Zone.   Co-founder of CAVE.
 * Kōetsu Iwabuchi – Artist for Guardian and Twin Cobra. Later served as planning manager for Grind Stormer.
 * Yuko Tataka – Character designer for Truxton, Hellfire, Twin Hawk, Zero Wing and Fire Shark.
 * Sanae Nitō – Character designer for Truxton, Hellfire, Twin Hawk, Zero Wing and Fire Shark.
 * Tsuneki Ikeda – Programmer for Grind Stormer and Batsugun.  Co-founder of CAVE.
 * Satoshi Kōyama – Programmer for Batsugun. Later worked at CAVE on several projects.
 * Junya Inoue – Designer for Dogyuun, Knuckle Bash and Batsugun. Later worked at Gazelle and CAVE on several projects.
 * Yusuke Naora – Graphic designer for Grind Stormer. Later worked at Square Enix on several projects.
 * Kenichi Takano – One of the six original team members and designer for Performan.  Co-founder of CAVE.
 * Yuichirō Nozawa – One of the six original team members and designer for Twin Hawk.
 * Atsushi Kawaguchi – One of the six original team members and artist for Demon's World.
 * Nanpei Kaneko – Designer for FixEight and Knuckle Bash. Later worked as illustrator for Japanese magazines.
 * Tomonobu Kagawa – One of the three graphic artists for Truxton II. Later worked at Taito on several projects.

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: Toaplan


text:
Mount Etna

Mount Etna, or simply Etna (Etna or Mongibello ; Muncibbeḍḍu  or 'a Muntagna; Aetna; Αἴτνα and Αἴτνη ), is an active stratovolcano on the east coast of Sicily, Italy, in the Metropolitan City of Catania, between the cities of Messina and Catania. It is located above the convergent plate margin between the African Plate and the Eurasian Plate. It is one of the tallest active volcanoes in Europe, and the tallest peak in Italy south of the Alps with a current height (July 2024) of 3369 m, though this varies with summit eruptions. Over a six-month period in 2021, Etna erupted so much volcanic material that its height increased by approximately 100 ft, and the southeastern crater is now the tallest part of the volcano.

Etna covers an area of 1190 km2 with a basal circumference of 140 km. This makes it by far the largest of the three active volcanoes in Italy, being about two and a half times the height of the next largest, Mount Vesuvius. Only Mount Teide on Tenerife in the Canary Islands surpasses it in the whole of the European–North-African region west of the Black Sea.

In Greek mythology, the deadly monster Typhon was trapped under this mountain by Zeus, the god of the sky and thunder and king of gods, and the forges of Hephaestus were said also to be underneath it.

Mount Etna is one of the world's most active volcanoes and is in an almost constant state of activity. The fertile volcanic soils produced from this activity support extensive agriculture, with vineyards and orchards spread across the lower slopes of the mountain and the broad Plain of Catania to the south. Due to its history of recent activity and nearby population, Mount Etna has been designated a Decade Volcano by the United Nations. In June 2013, it was added to the list of UNESCO World Heritage Sites.

Etymology and mythology
One view is that the word Etna is from the Greek αἴθω (aíthō), meaning "I burn", through an iotacist pronunciation. Another view is that the name is derived from the Phoenician word attuna meaning 'furnace' or 'chimney'. In Classical Greek, it is called Αἴτνη (Aítnē), a name given also to Catania and the city originally known as Inessa. In Latin it is called Aetna. In Arabic, it is called Jabal al-Nār (جبل النار, 'the Mountain of Fire'). According to both Greek and Roman mythology, Vulcan/Hephaestus, the god of blacksmithing, had his forge under mount Etna.

The volcano is also known as Muncibbeḍḍu in Sicilian and Mongibello in Italian, generally regarded as deriving from the Romance word monte/munti plus the Arabic word jabal (جبل), both meaning 'mountain'. According to another hypothesis, the term comes from the Latin Mulciber (qui ignem mulcet, 'he who placates the fire'), one of the Latin names of the god Vulcan. Today, the name Mongibello is used for the area of Mount Etna containing the two central craters, and the craters located southeast and northeast of the volcanic cone.

The name Mongibel is found in Arthurian Romance, as the name of the otherworld castle (or realm) of Morgan le Fay and her half-brother, King Arthur, localised at Etna, according to traditions concerning them derived from the stories told by the Breton conteurs who accompanied the Norman occupiers of Sicily. What were originally Welsh conceptions concerning a dwarf king of a paradisal, Celtic underworld became attached to the quasi-historic figure of Arthur as "Ruler of the Antipodes" and were then transplanted into a Sicilian milieu, by Bretons impressed by the already otherworldly associations of the great, volcanic mountain of their new home. Mediaevalist Roger Sherman Loomis quotes passages from the works of Gervase of Tilbury and Caesarius of Heisterbach (dating from the late twelfth century) featuring accounts of Arthur's returning of a lost horse which had strayed into his subterranean kingdom beneath Etna. Caesarius quotes as his authority for the story a certain canon Godescalcus of Bonn, who considered it a matter of historical fact of the time of Emperor Henry's conquest of Sicily circa 1194. Caesarius employs in his account the Latin phrase in monte Gyber ('within Etna') to describe the location of Arthur's kingdom.

The Fada de Gibel of the Castle of Gibaldar (Fairy of Etna) appears in Jaufre, the only surviving Arthurian romance in the Occitan language, the composition of which is dated to between 1180 and 1230. However, in Jaufre, while it is clear from her name that the fairy queen in question is Morgan le Fay, the rich underworld queendom of which she is the mistress is accessed not through a fiery grotto on the slopes of Etna, but through a 'fountain' (i.e., a spring) – a circumstance more in keeping with Morgan's original watery, rather than fiery, associations, before her incorporation into the folklore of Sicily. Another Sicilian conception of the fairy realm or castle of Morgan le Fay is the Fata Morgana, an optical phenomenon common in the Strait of Messina.

History of volcanic eruptions
Eruptions of Etna follow multiple patterns. Most occur at the summit, where there are five distinct craters: the Northeast Crater, the Voragine, the Bocca Nuova, and two at the Southeast Crater Complex. Other eruptions occur on the flanks, which have more than 300 vents ranging in size from small holes in the ground to large craters hundreds of metres across. Summit eruptions can be highly explosive and spectacular but rarely threaten the inhabited areas around the volcano. In contrast, flank eruptions can occur down to a few hundred metres altitude, close to or even well within inhabited areas. Numerous villages and small towns lie around or on cones of past flank eruptions. Since the year AD 1600, at least 60 flank eruptions and countless summit eruptions have occurred; nearly half of these have happened since the start of the 20th century. Since 2000, Etna has had four flank eruptions – in 2001, 2002–2003, 2004–2005, and 2008–2009. Summit eruptions occurred in 2006, 2007–2008, January–April 2012, in July–October 2012, December 2018, and again in February 2021.

Geological history
Volcanic activity first took place at Etna about 500,000 years ago, with eruptions occurring beneath the sea off the ancient coastline of Sicily. About 300,000 years ago, volcanism began occurring to the southwest of the summit (centre top of the volcano), then activity moved towards the present centre 170,000 years ago. Eruptions at this time built up the first major volcanic edifice, forming a stratovolcano in alternating explosive and effusive eruptions. The growth of the mountain was occasionally interrupted by major eruptions, leading to the collapse of the summit to form calderas.

From about 35,000 to 15,000 years ago, Etna experienced some highly explosive eruptions, generating large pyroclastic flows, which left extensive ignimbrite deposits. Ash from these eruptions has been found as far away as south of Rome's border, 800 km to the north.

Thousands of years ago, the eastern flank of the mountain experienced a catastrophic collapse, generating an enormous landslide in an event similar to that seen in the 1980 eruption of Mount St. Helens. The landslide left a large depression in the side of the volcano, known as 'Valle del Bove' (Valley of the Ox). Research published in 2006 suggested this occurred around 8,000 years ago, and caused a huge tsunami, which left its mark in several places in the eastern Mediterranean.

The steep walls of the valley have suffered subsequent collapses on numerous occasions. The strata exposed in the valley walls provide an important and easily accessible record of Etna's eruptive history.

The most recent collapse event at the summit of Etna is thought to have occurred about 2,000 years ago, forming what is known as the Piano Caldera. This caldera has been almost entirely filled by subsequent lava eruptions but is still visible as a distinct break in the slope of the mountain near the base of the present-day summit cone.

Mount Etna is moving towards the Mediterranean Sea at an average rate of 14 mm per year, the massif sliding on an unconsolidated layer above the older sloping terrain.

Historical eruptions
The first known record of eruption at Etna is that of Diodorus Siculus.

In 396 BCE, an eruption of Etna reportedly thwarted the Carthaginians in their attempt to advance on Syracuse during the Second Sicilian War.

A particularly violent explosive (Plinian) summit eruption occurred in 122 BCE, and caused heavy tephra falls to the southeast, including the town of Catania, where many roofs collapsed. To help with reconstruction after the devastating effects of the eruption, the Roman government exempted the population of Catania from paying taxes for ten years.

The Roman poet Virgil gave what was probably a first-hand description of an eruption in the Aeneid.

During the first 1500 years CE, many eruptions went unrecorded (or records have been lost); among the more significant are: (1) an eruption in about 1030 CE near Monte Ilice on the lower southeast flank, which produced a lava flow that travelled about 10 km, reaching the sea north of Acireale; the villages of Santa Tecla and Stazzo are built on the broad delta built by this lava flow into the sea; (2) an eruption in about 1160 (or 1224), from a fissure at only 350 – elevation on the south-southeast flank near the village of Mascalucia, whose lava flow reached the sea just to the north of Catania, in the area now occupied by the portion of the city named Ognina.

Rabban Bar Sauma, a Chinese traveller to the West, recorded the eruption of Etna on 18 June 1287.

The 1669 eruption, Etna's most destructive since 122 BCE, started on 11 March 1669 and produced lava flows that destroyed at least 10 villages on its southern flank before reaching the city walls of the town of Catania five weeks later, on 15 April. The lava was largely diverted by these walls into the sea to the south of the city, filling the harbour of Catania. A small portion of lava eventually broke through a fragile section of the city walls on the western side of Catania and destroyed a few buildings before stopping in the rear of the Benedictine monastery, without reaching the centre of the town. Contrary to widespread reports of up to 15,000 (or even 20,000) human fatalities caused by the lava, contemporaneous accounts written both in Italian and English mention no deaths related to the 1669 eruption (but give very precise figures of the number of buildings destroyed, the area of cultivated land lost, and the economic damage). Therefore, it is uncertain where the enormous number of fatalities can be attributed. One possibility is confusion between this eruption and an earthquake that devastated southeast Sicily (including Catania) 24 years later in 1693. A study on the damage and fatalities caused by eruptions of Etna in historical times reveals that only 77 human deaths are attributable with certainty to eruptions of Etna, most recently in 1987 when two tourists were killed by a sudden explosion near the summit.

Since 1750, seven of Etna's eruptions have had durations of more than 5 years, more than any other volcano except Vesuvius.

Modern-day eruptions (1923–present day)
As "Europe's most active volcano", eruptions occur frequently (with as many as 16 eruptions taking place in 2001). However, several eruptions of note have occurred over the last century.

A major eruption took place in June 1923, lasting from 6 June until 29 June. A large lava flow from an eruption in 1928 led to the destruction of a population centre for the first time since the 1669 eruption. The eruption started high on Etna's northeast flank on 2 November. Then new eruptive fissures opened at decreasing elevations down the flank of the volcano. The third and most vigorous of these fissures opened late on 4 November at an unusually low elevation, approximately 1200 m above sea-level, in a zone known as Ripe della Naca. The village of Mascali, lying down-slope of the Ripe della Naca, was almost completely destroyed in two days. Only a church and a few surrounding buildings survived in the north part of the village, called Sant'Antonino or "il quartiere". During the last days of the eruption, the flow interrupted the Messina-Catania railway line and destroyed the train station of Mascali. The event was used by Benito Mussolini's fascist regime for propaganda purposes, with the evacuation, aid, and rebuilding operations being presented as models of fascist planning. Mascali was rebuilt on a new site, and its church contains the Italian fascist symbol of the torch, placed above the statue of Jesus Christ.

Other major 20th-century eruptions occurred in 1949, 1971, 1979, 1981, 1983 and 1991–1993. In 1971, lava buried the Etna Observatory (built in the late 19th century), destroyed the first generation of the Etna cable-car, and seriously threatened several small villages on Etna's east flank. In March 1981, the town of Randazzo on the northwestern flank of Etna narrowly escaped destruction by unusually fast-moving lava flows. That eruption was remarkably similar to one in 1928 that destroyed Mascali. The 1991–1993 eruption saw the town of Zafferana threatened by a lava flow, but successful diversion efforts saved the town with the loss of only one building a few hundred metres from the town's margin. Initially, such efforts consisted of the construction of earth barriers built perpendicularly to the flow direction; it was hoped that the eruption would stop before the artificial basins created behind the barriers would be completely filled. Instead, the eruption continued, and lava surmounted the barriers, heading directly toward Zafferana. Engineers then decided to use explosives near the source of the lava flow, to disrupt a very efficient lava tube system through which the lava travelled for up to 7 km without losing significant heat or fluidity. The main explosion on 23 May 1992 destroyed the tube and forced the lava into a new artificial channel, far from Zafferana, and it would have taken months to re-establish a long lava tube. Shortly after the blasting, the rate of lava emission dropped, and during the remainder of the eruption (until 30 March 1993) the lava never advanced close to the town again.

Following six years (1995–2001) of unusually intense activity at the four summit craters of Etna, the volcano produced its first flank eruption since 1991–1993 in July–August 2001. This eruption, which involved activity from seven distinct eruptive fissures mostly on the south slope of the volcano, was well covered by the mass-media because it occurred at the height of the tourist season and numerous reporters and journalists were already in Italy to cover the G8 summit in Genoa. It also occurred close to one of the tourist areas on the volcano, and thus was easily accessible. Part of the "Etna Sud" tourist area, including the arrival station of the Etna cable car, were damaged by this eruption, which otherwise was a rather modest-sized event by Etna standards.

In 2002–2003, a much larger eruption threw up a huge column of ash that could easily be seen from space and fell as far away as Libya, 600 km south across the Mediterranean Sea. Seismic activity in this eruption caused the eastern flanks of the volcano to slip by up to two metres, and many houses on the flanks of the volcano experienced structural damage. The eruption also completely destroyed the tourist station Piano Provenzana, on the northeastern flank of the volcano, and part of the tourist station "Etna Sud" around the Rifugio Sapienza on the south flank. Footage from the eruptions was recorded by Lucasfilm and integrated into the landscape of the planet Mustafar in the 2005 film Star Wars: Episode III – Revenge of the Sith. The Rifugio Sapienza is near the site of a cable car station which had previously been destroyed in the 1983 eruption; it has now been rebuilt. Following a slow and non-destructive lava outflow on the upper southeastern flank between September 2004 and March 2005, intense eruptions occurred at the Southeast Crater in July–December 2006. These were followed by four episodes of lava fountaining, again at the Southeast Crater, on 29 March, 11 April, 29 April and 7 May 2007. Ash emissions and Strombolian explosions started from a vent on the eastern side of the Southeast Crater in mid-August 2007.

On 4 September 2007, a major episode of lava fountaining occurred from the new vent on the east side of the Southeast Crater, also producing a plume of ash and scoriae which fell over the east flank of the volcano. A lava flow travelled about 4.5 km into the uninhabited Valle del Bove. This eruption was visible far into the plains of Sicily, ending the following morning between the hours of 5 to 7 a.m. local time. Catania-Fontanarossa Airport shut down operations during the night for safety precautions.

An eruption on the morning of 13 May 2008, immediately to the east of Etna's summit craters was accompanied by a swarm of more than 200 earthquakes and significant ground deformation in the summit area. The eruption continued at a slowly diminishing rate for 417 days, until 6 July 2009, making this the longest flank eruption of Etna since the 1991–1993 eruption that lasted 473 days. Previous eruptions, in 2001, 2002–2003, and 2004–2005 had lasted 3 weeks, 3 months, and 6 months, respectively. Lava flows advanced 6.5 km during the first few days of this eruption but thereafter stagnated at many minor distances from the vents; during the last months of the eruption lava rarely advanced more than 1 km downslope.

Through January 2011 to February 2012, the summit craters of Etna were the site of intense activity. Frequent eruptions and ash columns forced the authorities to shut down the Catania airport on several occasions. The July 2011 episode also endangered the Sapienza Refuge, the main tourist hub on the volcano, but the lava flow was successfully diverted. In 2014, a flank eruption started involving lava flows and strombolian eruptions. This was the first flank eruption since 2008–09.

On 3 December 2015, an eruption occurred which climaxed between 03:20 and 04:10 local time. The Voragine crater exhibited a lava fountain which reached 1 km in height, with an ash plume which reached 3 km in height. The activity continued on the following days, with an ash plume that reached 7 km in height that forced Catania airport to shut down for a few hours. Volcanic gas emissions from this volcano are measured by a multi-component gas analyzer system, which detects pre-eruptive degassing of rising magmas, improving prediction of volcanic activity.

An eruption on 16 March 2017 injured 10 people, including a BBC News television crew, after magma exploded upon contact with snow.

An eruption on 24 December 2018, following a dyke intrusion at shallow depth, spewed ash into the air, forcing the closure of airspace around Mount Etna. Two days later, a magnitude 4.9 earthquake shook the town of Fleri and surrounding towns and hamlets in the Province of Catania, damaging buildings and injuring four people.

Beginning in February 2021, Mount Etna began a series of explosive eruptions, which have had an impact on nearby villages and cities, with volcanic ash and rock falling as far away as Catania. , the volcano has erupted 11 times in three weeks. The eruptions have consistently sent ash clouds over 10 km into the air, closing Sicilian airports. There have been no reports of injuries.

In February 2022 there were two eruptions. On 11 February 2022, at 6 pm, there were lava fountains from the Southeast Crater which became a single Strombolian eruption by 7 pm. Between 10 and 11 pm it had reached a height of almost 1,000 m and lava bombs were thrown at a considerable distance. Ash was blown west by the wind and then turned southeast. There was large lava flow in the western flank. On 19 February at 10.15 am there was an explosive eruption, again from the Southeast Crater, high lava fountains and lava flows, the longest of which went down the north-eastern flank towards the Bove Valley.

On 29 May 2022 a sudden collapse of the Southeast Crater created a fracture on its northern flank at an elevation of circa 2,800 m (9,186 ft). A small lava flow emerged and headed in the direction of the Leone Valley, just above the much larger Bove Valley. It continued for three days and was accompanied by small and sporadic eruptions from two of the many vents at the top of this crater.

Etna erupted once again on 4 July 2024 causing the Catania Airport to close due to volcanic ash in the air. The airport reopened the next day.

Volcanic explosivity index of recent eruptions
The Global Volcanism Program has assigned a Volcanic Explosivity Index (VEI) to all of Mount Etna's eruptions since January 1955:

Vortex rings
In the 1970s Etna erupted vortex rings, one of the first recorded events of this type, which are extremely rare. This happened again in 2000. Video footage of 8 June 2000 event was captured. Another event occurred on 11 April 2013. Other similar events occurred during the summer of 2023 (see photo) and 2024.

Geopolitical boundaries
The borders of ten municipalities (Adrano, Biancavilla, Belpasso, Bronte (from two sides), Castiglione di Sicilia, Maletto, Nicolosi, Randazzo, Sant'Alfio, Zafferana Etnea) meet on the summit of Mount Etna, making this a multipoint of elevenfold complexity.

Facilities
Etna is one of Sicily's main tourist attractions, with thousands of visitors every year. The most common route is through the road leading to Sapienza Refuge ski area, lying at the south of the crater at elevation of 1,910 m. From the Refuge, a cableway runs uphill to an elevation of 2,500 m, from where the crater area at 2,920 m is accessible.

Ferrovia Circumetnea – Round-Etna railway – is a narrow-gauge railway constructed between 1889 and 1895. It runs around the volcano in a 110-km long semi-circle starting in Catania and ending in Riposto 28 km north of Catania.

There are two ski resorts on Etna: one at the Sapienza Refuge, with a chairlift and three ski lifts, and a smaller one on the north, at Piano Provenzana near Linguaglossa, with three lifts and a chairlift.

Sapienza Refuge was the finish of Stage 9 of the 2011 Giro d'Italia and Stage 4 of the 2017 Giro.

title: Mount Etna


text:
Talk:Dewey Decimal Classification

Comparison with Library of Congress Classification
I think there is a typo in this part of the article. plz check. a word wit mn....? —Preceding unsigned comment added by 88.91.118.215 (talk) 22:17, 5 June 2010 (UTC)

Isaac Asimov
The Isaac Asimov comment seems unlikely. Someone should try to disprove it. Superm401 02:01, 29 Dec 2004 (UTC)

It's not true. He doesn't have any books in the Philosophy section. This is documented all over the place, including as an early sentence in Wikipedia's own entry on Asimov. I'm going to remove it. --Plumpy 08:09, Feb 25, 2005 (UTC)

 * No, but he does have a video... -- see this post from 025.431: The Dewey Blog. --zenohockey 03:09, 9 May 2006 (UTC)

Debatable Ease of use
"Thanks to the use of pure notation, a mnemonics system and a hierarchical decimal place system, it is generally easier to use for most users."

Seems like like more of a personal sentiment than a fact. Speaking as someone who works in a library with about 5 million books, some sorted in Dewey, and some in Library of Congress, the Congress ones usually have far less confusing call numbers after you try getting the Dewey system to try and deal with that number of books. (Unsigned by 150.135.48.109)

Agreed. The article can discuss the relative success of these "goals" or "advantages", but it's too much of a leap to declare one better in all aspects. GUllman 18:11, 4 August 2007 (UTC)

I agree. I've used both extensively, and LC is much easier to use in large libraries (such as at universities) in which Dewey needs unwieldy long numerical strings. In fact, at least LC has a 2-letter designation for each sub-area, and while it is a stretch to call this a mnemonic device, Dewey clearly has none at all, so this part of the statement is simply false. Unless someone can cite a scientific human factors study, this sentence is opinion and needs to get removed. Jpgs (talk) 01:04, 19 November 2007 (UTC)

So almost 5 years later this sentence still stands?? I guess no one pays much attention to the old Dewey Decimal classification? I'm not a librarian, but this entire article seems to be a pretty amateur piece of writing, even for Wikipedia. — Preceding unsigned comment added by 76.160.218.42 (talk) 22:56, 27 February 2012 (UTC)

Recent edits
I just added a few headers to break up the article in sections, since the text was already a bit long. This highlited some interesting facts which were buried in the final paragraphs. I also moved the description of the ten classes towards the beginning of the text, due to it's importance in illustrating how the DDC works. — Preceding unsigned comment added by Ramalho (talk • contribs) 16:28, 11 April 2005 (UTC)

Another edit
I added the ACM computer science classification link at the end. I think it might be relevant, since it's mentioned that the dewey system had lacked coverage on recent technology. —The preceding unsigned comment was added by 128.125.163.218 (talk) 01:28, 30 April 2007 (UTC).

Website
Does anyone know if there's a website where you can put in a book's ISBN number and it will tell you the Dewey call number for that book? Because I could really go for one of those. Thanks. -Branddobbe, May 16, 2005
 * Just a nitpicky point--for some reason, your "ISBN number" is set to link to the article on Redundancy (language), rather than the one on International Standard Book Number. Maybe that's because ISBN stands for International Standard Book Number, ISBN number means International Standard Book Number number.140.147.160.78 15:12, 22 February 2007 (UTC)Stephen Kosciesza
 * I have asked my librarian and she tells me:
 * "all libraries tend to be a little bit different in their assignment of Dewey and some don't use the Dewey System at all. However, you can usually get a general Dewey number that will allow you to at least browse around at that number eg 624.1513 for soil mechanics. However, the exact number will depend on the person cataloguing and the nature of the collection - it is a bit flexible."

 * So it looks like such a website would not work.--Commander Keane 06:20, 20 July 2005 (UTC)

Your local library's online catalog should be able to do this for you. For example, try www.sdcl.org — Preceding unsigned comment added by 170.213.132.252 (talk • contribs) 16:09, 4 November 2005 (UTC)

 * The Library of Congress catalog's website (catalog.loc.gov) is probably the closest you can get; if it doesn't work for a particular ISBN, try the ISBN for an earlier (or hardcover) edition. For example, search 0141439475 under "LCCN-ISBN-ISSN," then, on the resulting page, click "Full Record" and look for "Dewey Class No."  --zenohockey 03:06, 9 May 2006 (UTC)

All of these replies were true at the time, but last year, OCLC came out with OCLC Classify, an experimental site that will do just that. It can also give you an LCC number and LCSH terms. It draws data from WorldCat, so this means it will only work with books owned by WorldCat libraries (although that's 72,000 according to us), and if everyone on WorldCat is giving a book a bad classification number, that's what you'll get back too. --BDD (talk) 00:11, 7 July 2012 (UTC)
 * (2012) OCLC Classify
 * Searching one title and author surname (horses in battle, ambrus), I find that it does report all three: DDC, LCC, and LCSH. That is, for DDC and LCC it reports "most frequent" classifications 357.18 and UE15. For this book both most frequent classifications are used by 204 of 206 catalog entries; 2 are unclassified. So these classifications are uniform where they are not missing.
 * Our coverage, however, treats LCCN as LC Classification Number, not LC Call Number. We treat something like "UE15.A4" as a complete classification and something like "UE15.A4 1975" or even "UE15.A4 1975 copy 2" as a call number. In these terms, [OCLC Classify reports only the first part of LCC number.
 * Checking that book's LCCatalog record, I find that it reports longer LCC (UE15.A4) and DDC (357/.18/09).
 * Searching ISBN twice (details suppressed), I find no hits, although the books are catalogued by title and author. Example: imaginary worlds, carter . 256 print and 2 ebook holdings are uniformly classified; 1 print holding is radically different.
 * --P64 (talk) 14:33, 7 July 2012 (UTC)

Suggestion for edit
The opinion that the DDC is inferior to other systems of classification doesn't really have a place in the encyclopedia entry. The DDC is ideal for certain types of collections, just as the LCCS is ideal for others. The DDC is, in fact, superior in some instances in terms of categorization and ease of browsing. I'm not the person to change this, but someone should. — Preceding unsigned comment added by 70.243.113.26 (talk • contribs) 08:33, 6 February 2006 (UTC)

Linking the classes with square brackets
Shall I intelligently link the listed classes to their relevant articles with squre brackets, or will it be reversed? --81.105.251.160 06:02, 25 May 2006 (UTC)

 * Do you mean to create articles on each of the ten classes or just links to the subjects represented by the classes? Either way, not sure it is a good idea. Pages about each of the classes would be to much detail when there is link at the bottom where you can get that info. Subject links might be confusing because people would associate the subjects with the classes, which is not completely the case. Nowimnthing 22:07, 25 May 2006 (UTC)

 * It would probably not be useful since users come here to learn about the Dewey Decimal System, not the subjects. If they wanted to browse Wikipedia articles DDC order, then they would go here. GUllman 18:57, 26 May 2006 (UTC)

The Book?
Ever since I started getting into the DDC, I always wondered what was up with 002. What the heck does it mean when 002 is listed as being "The book"? Phauge 03:23, 2 July 2006 (UTC)

 * Books about books (the history of printing and bookmaking, things like that,) perhaps? That's a guess, but I just did a quick Google search and couldn't find an explanation.  That's what I've always assumed it meant, though.  - Square pear 19:12, 2 July 2006 (UTC)

 * That's my understanding. People frequently refer to books in general using the definite article (e.g., "art and history of the book"). --Benjamin Mako Hill (talk•contribs) 14:33, 11 August 2006 (UTC)
 * Yes, I looked up some "books about books" and their DDC numbers did indeed begin with "002". LaMona 01:55, 15 September 2006 (UTC)

Copyvio?
Is the list in the article (which might be better on a seperate list page) a possible violation of a database copyright (as the article itself says copyright is claimed on the system)? I think it could be fair use as it is difficult to talk about DDC in an encyclopedia without including a copy of the system. Joe Llywelyn Griffith Blakesley talk contrib 12:40, 6 August 2006 (UTC)
 * OCLC has a PDF on its web site that gives the DDC numbers for the first 3 digits of DDC. In their contract, they say that libraries can display the first 3 digits to the public, but no more. So I think this is the allowed portion and therefore there isn't a problem. LaMona 01:54, 15 September 2006 (UTC)

"Many libraries" do give more than three digits, to indicate subsections of a subject: and "many people" are unlikely to be interested in the numerical details. If there is a theoretical copyvio problem a "created example" - identified as such - would get around the issue. Jackiespeel 13:27, 20 April 2007 (UTC)

More expressive?
The article claims that that the DDC is "more expressive" than the LoC system. Why is this? Is expressive being used as a term of art here? If so, it deserves an explanation. If not, it seems POV. --mako 14:12, 11 August 2006 (UTC)

 * expressive simply means being able to express relationship between classes. For example UDC uses + to show a relationship between 2 concepts/classes. Aarontay 12:47, 30 January 2007 (UTC)

pros/cons
I added a few paragraphs of the pros and cons of DDC vs LCC etc. I don't have my books and papers with me now, I will add in a few references later. Aarontay 12:53, 30 January 2007 (UTC)

Date
I'm 12 and the info on the date was wrong, it was 1873 121.45.40.54 09:55, 12 June 2007 (UTC)

 * It does seem that 1873 is Dewey's "development" date, while the first publication was in 1876. The introduction to the 1899 edition (the 6th edition, which I have in hand) says: "The plan of the following Classification and Index was developt early in 1873."(p.7) It also says "When the first edition was published in 1876...." (p.8) and it says that edition had "...12 pages of tables containing the thousand sections..." (p.8) Then at the end of the introduction(p. 41) it says: "New York State Library, Dec. 25, 1890. The previous editions have been dated "Amherst College Library, June 10, 1876; Columbia College Library, august 10, 1885; and Columbia College Library, Aug. 30, 1888." (This leads me to believe that this 1890 introduction was repurposed for the 1899 edition.) The copyright statement on the book lists these dates: 1876, 1885, 1888, 1891, 1894, 1899. LaMona 21:45, 12 August 2007 (UTC)

Dewey Decimalise Wikipedia?
It's probably an unworkable idea, but would it be useful to have a project that assigns Wikipedia entries to Dewey decimal categories? Shiftaling 10:31, 8 October 2007 (UTC)
 * It would take a lot of work with no real benefit. The purpose of Dewey decimal numbers is to arrange physical books in a linear order on the shelf so that similar subjects are located near each other.  Wikipedia articles cover very specific topics from a paragraph to a few pages long, and each one is related to many other articles like a web or network.  Even the articles on very general subjects, such as academic fields, do not exactly match the words that are used by Dewey.  Browse through List_of_Dewey_Decimal_classes, and see how few Dewey categories exactly match the scope of Wikipedia articles. GUllman 20:46, 8 October 2007 (UTC)
 * The UDC would be more suitable than DDC for the task, but I don't see any real point.  GNUSMAS :  TALK  21:01, 8 October 2007 (UTC)

I have been mulling this one over for a while, and now I find that Shiftaling beat me to it by 6 years! Is there any milage in suggesting it to the wider community, for instance via an RfC? I do see a use, not for organising Wiki, but for leading the reader from an article to that part of the library where similar books are to be found. A possible way would be a hat note, for instance start an article on "Scottish Clans & Tartans" with to produce output such as Books on this subject may be found at 305.891 in a library. In the UK most public libraries use DDC, if this is not the case elsewhere please say so. Accademic and national libraries are not relevant, we are seeking to help the ordinary reader: WP:RF. If there are stong feelings in favour of UDC or LCC then there is nothing to stop a similar hat note being developed. Martin of Sheffield (talk) 22:33, 27 August 2013 (UTC)
 * Have a look at User:Martin of Sheffield/sandbox3 which uses a template at User:Martin of Sheffield/sandbox where I've had a first stab at it. Martin of Sheffield (talk) 12:14, 28 August 2013 (UTC)
 * This really is a waste of people's time. Wikipedia is a single work made up of individual encyclopedic articles--not a library made of individual works. If it's to be given a Dewey number at all, that number is 003, the number for encyclopedias and dictionaries. You might as well be trainspotting and call it "research" as assign individual Dewey or LC numbers to these articles.  Speaking of which, the act of assigning a Dewey or LC number to a topic might actually constitute original research and would therefore have no place in the article either.  ZarhanFastfire (talk) 07:37, 5 December 2014 (UTC)
 * I agree with you, but then we are talking about different things. I've not seen anyone suggest that articles are assigned Dewey numbers, which would be rather daft, Dewey is a way of organising books, not an online encyclopedia.  My suggestion was that a hat note pointed to where books on the subject might be found in a library, most of which still have physical books on real shelves.  Such a note would not be mandatory, so hardly constitutes "a waste of people's time", after all it is pretty easy to look at the reference books you are using and see the number in large friendly numbers on the spine.  Maybe allow 5 seconds to look and 10 seconds to type?  Martin of Sheffield (talk) 10:35, 5 December 2014 (UTC)
 * The very first entry in this section of the talk page suggests DDC'ing the entries on Wikipedia--those entries are articles, not books. So I'm sorry I misread you and thought you were seriously going along with what we both agree is a daft idea.  I'm still not convinced your own suggestion would either be very helpful (since books are not always about single topics easily classified in just one place), or consistent with Wikipedia rules regarding synthesis and OR, which is what your hat note might constitute.  Presumably this page would not be where to promote it (it being just a talk page for an article, not one about policy of the encyclopedia).  But don't let me pour cold water all over the idea. If properly executed in a limited way, your proposal could well have a lot of merit, unlike some current practices I've noted recently, namely seeking single numbers to assign to books: lately a lot of articles about books on WP now have OCoLC numbers on their pages, even though a book that has gone through dozens and dozens of editions should of course have dozens and dozens of possible OCoLC numbers, which are just records of a single expression of a work. Why anyone think this is at all useful for talking about the work itself in an encyclopedia article is utterly beyond me. ZarhanFastfire (talk) 06:05, 15 December 2014 (UTC)

Introduction
This article lacks an introduction. I've never head about it before - Is it widely used? Where is it used? By whom is it used? I suspect it was written by an American, for Americans, with no regard for what isn't obvious to non-Americans. Thanks. CapnZapp (talk) 22:22, 15 February 2008 (UTC)
 * Are you just trolling? The article does have an introduction, and then gives the answers to all of your questions. If this is a serious post, then you have never used a library. Most libraries in the English-speaking world use the DDC. Visit your local public library and see.--Iacobus (talk) 04:26, 7 April 2008 (UTC)

Popular culture - Seinfeld
I don't really see how this citation serves to explain anything about DDC. It's just a crazy comment by Kramer. Any objections to removing the citation? If so, please explain why it should be in this article.--Iacobus (talk) 04:28, 7 April 2008 (UTC)

"How it works" section
Confused... "How it works" starts with "The DDC attempts to organize all knowledge into four main chapters." and then says "The ten main classes ". How did we go from four chapters into ten classes? Thanks! Hendrixjoseph (talk) 02:37, 6 March 2008 (UTC)

There should be a mention of what the other modern systems are...

Also, what about the criticism of its racism and Eurocentricity? For example, under religion- numbers 200-289 are reserved for Christianity, whereas Judaism and Islam get one number each. —Preceding unsigned comment added by 18.247.7.195 (talk) 00:58, 7 April 2008 (UTC)

The entire system is outdated with search and find
You go to a library. You're looking for a book written by a partnership of people, part fiction, part biographical, part scientific, utilizing more than one language, and covering more than one subject, while listing recipes. Where to start? How did the librarians and bookstores decide which shelf to put it on? Search and find knowing a few key words handles the problem of finding it. However, it's for the browser, looking for similar works, that gets floored. Amazon online handles the problem well. Any practical person reading this article for clues will get nowhere. JohnClarknew (talk) 20:27, 19 December 2009 (UTC)

 * No library or bookshop intends its classification scheme to be the sole means of finding items, and either should have an electronic catalogue that can be searched using key words. (Amazon's catalogue may sometimes make it easier to find a given item, but not consistently in my experience.) EALacey (talk) 21:06, 19 December 2009 (UTC)

 * What I mean is Amazon's ability to put up similar titles under a "if you like this book, you might also like ..." which is for the browser. Bookstores and libraries don't do this. JohnClarknew (talk) 05:37, 20 December 2009 (UTC)

Criticism of LC
Is it necessary to have the paragraph criticizing the LCCS at the end of the criticisms of the DCC? This seems more an attempt to 'salvage' the DDC at the end of the criticisms. Everything has its shortcomings. I don't think we need to list the shortcomings of similar/competing ideas just to make this one feel better. Ffenliv (talk) 18:24, 12 January 2010 (UTC)

 * I think it's time to remove the entire comparison to LCC. While it may be an interesting topic, it doesn't belong in this article. Can we come to some agreement about this? LaMona (talk) 18:31, 24 June 2013 (UTC)

 * WP is an encyclopedia. It can hold no opinions. Instead, it should report facts as stated in reliable sources and opinions of those notable for their expertise, giving them due balance. Like most older articles, this one makes claims not supported by references. Such claims may be deleted by anyone challenging them. That's how WP works. David Spector (talk) 18:54, 6 August 2013 (UTC)

no such word as "hospitability"
this requires an alternative. word not found in 4 dictionaries (including cambridge, onelook, merriam-webster, and dictionary.com). —Preceding unsigned comment added by 128.250.5.248 (talk) 00:25, 14 January 2011 (UTC)

Maintained how?

 * Besides its frequent revision, DDC's main advantage over [LCC]...

At another point we say that DDC is "infinitely hierarchical". Does that mean classifications are infinitely long, in principle? Does revision merely extend the strings? If they change more fundamentally, as US zipcodes or telephone exchanges do, what happens to the stock of books?

What is the scope of one decimal, by design? all printings of one edition? (more than that, I learn from the article) all fiction by one author? etc

Probably the article should give an example or three in order to help define the DDC. For one idea, what is the longest current DDC? Is DDC part of a standard system that incorporates but extends it? Or do specific users of the DDC assign all of the prefixes or suffixes (separated by spaces or newlines, i think)? --P64 (talk) 17:38, 17 October 2011 (UTC)
 * (afterthought) Alternatively, do users commonly use only part of the DDC? If a book is called as "813.5 x1alphanumeric", is its DDC almost sure to be 813.5 or likely to be longer "813.5.numeric"? --P64 (talk) 23:00, 17 October 2011 (UTC)

Source 2
There is very important information in source 2 that should be in the article.

walle1357, a nice wikipedian :) (talk) 18:06, 9 December 2011 (UTC)

Tables?
The article lists Dewey's Table as so: I thought the Dewey Tables were: Which comes from this pdf Which you can download from this website — Preceding unsigned comment added by 90.244.216.165 (talk) 21:30, 14 May 2013 (UTC)
 * standard subdivision
 * areas
 * subdivision of individual literatures
 * subdivisions of individual languages
 * racial, ethnic, national groups
 * languages
 * persons
 * T1 Standard Subdivisions
 * T2 Geographic Areas, Historical Periods, Biography
 * T3 Subdivisions for the Arts, for Individual Literatures, for Specific Literary Forms
 * T4 Subdivisions of Individual Languages and Language Families
 * T5 Ethnic and National Groups
 * T6 Languages

 * You are quite correct, the existing article is using DDC 22, the PDF to which you refer is using DDC 23. There are a number of updates required both to this page and to the page List of Dewey Decimal classes.  Unfortunately OCLC have moved the previously 1,000 summaries out of the public area and hidden them behind the DeweyWeb.  DeweyWeb is available on subscription only, so the pages are likely to remain out of date until someone in a major library decides to update them.  I have, however, updated the table list just now. Martin of Sheffield (talk) 22:56, 14 May 2013 (UTC)

 * There is online access to DDC beyond the 3-digit, 1K list at dewey.info. I will add this to the page. LaMona (talk) 18:29, 24 June 2013 (UTC)

DDC vs LC
LaMona, the link you provide to the comparison of DDC and LC is valuable, but that page only seeks to tabulate the actual differences. The text you removed sought to explain the differences, including contrasting the relevant stengths and weaknesses. Might I sugest reinstating some or all of the text with a {{See also... hat note to provide the link? Consider WP:RF, would a casual reader gain anything from a long table? Regards, Martin of Sheffield (talk) 08:42, 25 June 2013 (UTC)
 * Agreed. Ideally, perhaps, we could have a single paragraph that summary-style summarizes those strengths and weaknesses, with a Seealso hatnote, that could be placed within both this article, and also within the LCC article (which I note just has a lede section and a large list, currently). –Quiddity (talk) 15:38, 25 June 2013 (UTC)
 * I think the text belongs on the comparison page, not here. In the article on DDC you could justifiably compare it to any number of classification systems, of which LCC is not the most likely (the most likely, IMO, would be UDC). The "DDC v LCC" issue is very US-centric. If anyone wants to copy the text to the comparison page, that would be great, however, it must be sourced. Meanwhile, I'll have some historical info to add soon on why we ended up with two primary classifications rather than just one. Most of what was on this page was unsourced, and that's something I'm trying to correct. LaMona (talk) 17:56, 4 July 2013 (UTC)

Relativ Index
Folks keep reverting the title from "Relativ Index" to "Relative Index." Dewey did actually spell it "Relativ" and that spelling remained until the 1950's. Please leave the titles as they are spelled in the actual works. LaMona (talk) 18:01, 4 July 2013 (UTC)
 * LaMona, I don't have access to the source, but I think the changes to "pamflet" and "rerum" are also wrong, the next sentance notes Dewey's use of "reformed" spelling. There are also some other changes the IP made (redundant "first", unnecessary use of first name, capitalisation of "library") so I'm going to revert to Yintan's version. Regards, Martin of Sheffield (talk) 09:19, 5 July 2013 (UTC)
 * Martin, many of the early volumes can be found digitized on the Open Library or Google Books. I may make a list of those ... don't know if having a section on editions would be over-much, but I now have a table with editions, dates, # pages, editor. I could add URLs. It could be a separate page. LaMona (talk) 14:18, 11 July 2013 (UTC)
 * The Dewey Decimal organisation itself (OCLC) spells it "Relative Index". It is therefore just plain eccentric to use Dewey original spelling for this or other words. Although certainly, a note can be added saying that that is how he himself spelled it. Kanjuzi (talk) 16:52, 25 December 2016 (UTC)

DDC editors
This statement: "While he lived, Melvil Dewey edited each edition himself:" is not true. cf. Comaromi, p. 214 "By the time the fourth edition was published the DDC had a new editor, May Seymour." I will compile a list of the editors as well I can. LaMona (talk) 18:10, 4 July 2013 (UTC)

major edits happening
I am making major edits to the page at the moment, and will try to keep the page in a usable condition. I will be adding new sections and doing some reorganizing as well. I'm happy to share my thoughts on this. I'm doing some drafting in my Sandbox, since I'm having some trouble figuring out where things go. Help is welcome. LaMona (talk) 00:39, 6 July 2013 (UTC)
 * I'll be in and out all day, but will try to help out and tweak small things.
 * (Note: If things start to look weird, check the "edit source" and search for any stray "nowiki" tags. If you paste wikimarkup into the visualeditor, it adds nowikis in places.) –Quiddity (talk) 00:55, 6 July 2013 (UTC)
 * Thanks. I admit that I've had some struggles with the visual editor, and for anything but simple word replaces prefer the source. I guess I'll get used to it. LaMona (talk) 01:22, 6 July 2013 (UTC)

OK, I've completely re-done a history section. If it's TMI, let me know. Ran into some problems with the visual editor and references, but I think I've fixed them. I will soon have a revised (but not terribly detailed) adminstration section that lists most of the editors over the life of DDC. Once again, help is always welcome. LaMona (talk) 19:15, 9 July 2013 (UTC)
 * History section is great. I've given it a once-over, and fixed a few small things, and added some links. I look forward to reading more. :) –Quiddity (talk) 20:27, 9 July 2013 (UTC)

I'd like to re-order the page so that it reads: - History - Administration - Design - Influence I'd also like to remove the link to "duodecimal" since I consider that confusion to be highly remote. I will next be working on a short piece comparing DDC to other classifications, including LCC, EC (Cutter) and perhaps Bliss. Let me know if there are any objections.LaMona (talk) 15:58, 17 July 2013 (UTC)

Remove link to duodecimal?
I can't imagine that anyone has ended up on this page looking for duodecimal. Should we remove that link? LaMona (talk) 15:15, 28 July 2013 (UTC)
 * I'd say keep it. It is just a one line template, not a great thing.  I can remember talking to my late father many years ago and he made the duo/dewey mistake so yes, it can occur.  On the other hand if anyone has strong feelings I won't object. Martin of Sheffield (talk) 22:39, 29 July 2013 (UTC)

Dewey system? or Decimal Classification?
I see that there are many references to the "Dewey system" in the text. Dewey himself referred to it as "the Decimal Classification," which was its title at least through the 1930's. I have not been able to establish when it began being called the "Dewey Decimal Classification" but that was not its original name. Would it make sense to refer to it in the text as "Decimal Classification" rather than the "Dewey system"? The former is a proper noun, the latter is not.LaMona (talk) 13:28, 5 October 2013 (UTC)

Dewey and trademark vs copyright
I edited a few sentences that implied that the Library Hotel lawsuit was about copyright (when in fact it was about trademark). Since there has been a discussion over at Wikidata and also here in en:wp about using Dewey, and because people keep bringing up the "copyright" suit, I fixed it. However, since I work for OCLC, I may have a CIO, so I want to invite others to check it out for themselves. This was not well reported in the popular press but there's a copy of the original filing here: news.findlaw.com/hdocs/docs/dewey/oclclbry91003cmp.pdf. Merrilee (talk) 22:26, 21 October 2013 (UTC)
 * Merilee - you are absolutely right that the issue was Trademark, and if that wasn't clear in the article I am glad that you cleared it up. Copyright is on the published TEXT; trademark is on the name. WE've been through this a few times in this article. LaMona (talk) 00:23, 22 October 2013 (UTC)

Pure science? edit war?
The article keeps going back and forth between 500 Pure Science and 500 Science. The dewey.info site, which was produced by the current editor of DDC, says 500 Science, as does the OCLC summaries page. I will wait a bit for arguments to the contrary, but I think this makes 500 Science definitive. LaMona (talk) 15:58, 2 May 2014 (UTC)
 * Also, technology is NOT listed as "(Applied Science)" -- please consider these headings as quotes, not as editable text. --LaMona (talk) 22:14, 20 May 2014 (UTC)

Roget
Was Roget's arrangement of ideas in his thesaurus an inspiration at all? What are the precedents for the arrangement of ideas and knowledge in an orderly, numerical, fashion? Wodorabe (talk) 16:23, 17 September 2015 (UTC)
 * You can see some history at Library_classification but that article seriously needs work. I have never heard a mention of Roget in any works about DDC, but that isn't surprising - Roget was organizing words and Dewey (and other library classificationists) were organizing books. The needs and use cases are significantly different. LaMona (talk) 06:05, 18 September 2015 (UTC)

Recent edits of talk page
Someone (more than one IP) has been editing the talk page. I tried to read through it, and it didn't look like vandalism, but it also made no sense. If you think these edits should remain, please explain here. Meanwhile, they have been reversed. If you think you are editing the DDC page, you aren't, this is the discussion area for the article. LaMona (talk) 21:32, 8 April 2016 (UTC)

Rollback of LT
There was a sentence added about Library Thing's use of Dewey, but that being one system out of hundreds of thousands, it was definitely WP:UNDUE. If we ever create a page for non-traditional systems using Dewey, with at least many of them, then this would fit. But as the only system named on the page it isn't appropriate. LaMona (talk) 19:57, 23 July 2016 (UTC)

Added criticism, need help with re-using citation
I added two subsections on criticism and I cited my research based largely on the Power to Name by Hope Olson (it is available on Google Books), and I could not figure out how to reuse the book as a source but change the page number. The source in the religion category is the right number, but the one in the Treatment of Women category should all be on page 8 instead of 22. Can I get some help on that? Craig21215 (talk) 14:16, 20 March 2018 (UTC) — Preceding unsigned comment added by Craig21215 (talk • contribs) 14:10, 20 March 2018 (UTC)

✅ I've turned on ref=harv in the original reference/citation, then other references can use sfn to link to the original and add a different page number. Martin of Sheffield (talk) 14:23, 20 March 2018 (UTC)

 * why are these specific criticisms - homosexuality, religion and women - in this article? While there are sure to be publications which focus on these issues and as such can be used to legitimise inclusion on the basis of those publications existing - a circular process - that does not make this relevant in this context. This is an article about a generic classification system, not one about specific identity categories. If these are allowed to stay there will be no legitimate reason to exclude other identity categories, the number of which is growing exponentially. Either remove these three specific criticisms and boil the essence of the criticism down into a more generic, not identity-related criticism or accept that this can only end with each and every article on Wikipedia being taken over by sections like these. Yetanwiki (talk) 07:59, 10 May 2021 (UTC)

 * The section needs a bit of editing. There are two heads: WASP-bias (with religion as an example) and changing attitudes to groups (with women, race and sexuality as examples).  Details specifics are probably not needed or it will degenerate into an unseemly list.  I might give it a go in a couple of days unless someone else wants to pick up the baton. Martin of Sheffield (talk) 08:41, 10 May 2021 (UTC)

Inactive external link
The external link "Dewey Summaries as Linked Data" (http://www.worldcat.org/devnet/wiki/DeweyInfoTechOverview) is inactive.--192.115.96.51 (talk) 07:20, 21 June 2018 (UTC)

DDC introduced to UK?
A self-published newsletter from a publisher based in the former Lady Stephenson Library in Newcastle upon Tyne states that this library was the first in the UK to use DDC, introduced by Andrew Keogh who went on to be University Librarian at Yale. Can anyone source this statement, and add it to this article, or the section about the library, or Keogh's article? It seems an interesting point of history but I'm not sure that the newsletter is a WP:RS. Pam D  09:04, 16 April 2020 (UTC)

Information about number building
The information about DDC number building and synthesized DDC numbers is not obvious nor easy to understand so a more detailed description would help to better understand DDC. -- JakobVoss (talk) 16:02, 25 March 2021 (UTC)
 * This is summarised under §3 Design. There needs to be a balance struck between three competing viewpoints: WP:COPYVIO – the tables are (I believe) copyright; WP:NOTHOWTO – the aim is to describe, not instruct and lastly a desire for WP to be as universal as possible.  I might be persuaded to have a go at explaining in more detail if others would indicate where the balance is, alternatively would a librarian would take up the task? Martin of Sheffield (talk) 16:32, 25 March 2021 (UTC)

Re: Treatment of Homosexuality
Hi everyone! I was reviewing reference number 52 in relation to the section on the treatment of Homosexuality and I think the source was misread. It has an accurate As of tag, but the source itself provides further information regarding a classification change. The OCLC no longer recommends the use of 363.49, directly contradicting the claim made by the post. I'm still new here, so I wanted to post a note before going in to settle on an edit that would work. Whisperwind1242 (talk) 00:23, 5 February 2024 (UTC)

title: Talk:Dewey Decimal Classification