/b/
The "random" board /b/, based on the Nijiura board of Futaba Channel, is by far 4chan's most popular board. This was confirmed by statistics released by 4chan staff, as well as the post count; As of September 20, 2007, /b/'s post count has surpassed 40,000,000 posts whereas most of the other boards have yet to break 250,000. Only five other boards (/a/, /co/, /v/, /r/, and /s/) have accumulated more than 1,000,000 posts (/a/ and /v/ having over 4,000,000). After /b/'s 31,000,000th post was made on June 16, 2007, it took only 9 days to accumulate another 1,000,000 posts on /b/, meaning /b/'s posting rate has now attained an average of more than 111,000 posts per day. Certain post numbers, such as 12345678 and 22222222, and the aforemented milestones, are sought after, with a large amount of posting taking place to "get" the number.[6]
The humor of /b/'s many users, who refer to themselves as "/b/tards,"[7] is frequently characterized by intricate inside-jokes and Black comedy. As a result, newcomers and outsiders often find posts incomprehensible. In addition, /b/ is known to officially have a "No rules" policy, save for a ban on certain illegal content, such as child pornography and invasions of other websites, both of which are restricted by site-wide rules that also apply to /b/.[8]