As a witness, he explained the terminology used on 4chan to the prosecutor, ranging from "OP" to "lurker".

Launched on October 1, 2003, its boards were originally used for posting pictures and discussing manga and anime, as the site was modeled on Japanese imageboards, particularly 2chan.

The site quickly became popular and expanded, though much of 4chan's content still features otaku, anime, and other Japanese cultural influences.

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Users generally post anonymously, with the most recent posts appearing above the rest.

The Guardian once summarized the 4chan community as "lunatic, juvenile [...] brilliant, ridiculous and alarming." The website is split into six categories: Japanese culture, Interests, Creative, Adult (18 ), Other, and Misc (18 ).

These provide for on-topic boards to discuss anime, manga, technology, sport, photography, music, hentai, torrents, travel, physical fitness, as well as a random board.Through its association with Anonymous, 4chan has become associated with Project Chanology, a worldwide protest against the Church of Scientology held by members of Anonymous.On January 15, 2008, a 4chan user posted to /b/, suggesting participants "do something big" against the Church of Scientology's website.By November 2011, 4chan made the transition to utilizing Cloud Flare following a series of distributed denial of service attacks.The 4chan imageboards were rewritten in valid HTML5/CSS3 in May 2012 in an effort to improve client-side performance.In January 2011, Poole announced the deletion of the /r9k/ ("ROBOT9000") and /new/ (News) boards, saying that /new/ had become devoted to racist discussions, and /r9k/ no longer served its original purpose of being a test implementation of xkcd's ROBOT9000 script.