Imageboard

imageboardstripcodeBooruImage boardKarachanKrautchan888chanchanDanbooruDanbooru-style imageboards
An imageboard is a type of Internet forum that revolves around the posting of images, often alongside related text and discussion.wikipedia
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4chan

4chan.org/b//r9k/
The most popular English language imageboard, 4chan, similarly has a large variety of topics.
4chan is an anonymous English-language imageboard website.

Textboard

Ayashii World
The first imageboards were created in Japan as an extension of the textboard concept.
Textboards, like imageboards, were invented in Japan, but they remain relatively unknown outside it, in contrast to imageboards (such as 4chan).

Anonymous post

Internet anonymityanonymityanonymously
Most imageboards and 2channel-style discussion boards allow (and encourage) anonymous posting and use a system of tripcodes instead of registration.
Others like JuicyCampus, AutoAdmit, 2channel, and other Futaba-based imageboards (such as 4chan) thrive on anonymity.

Futaba Channel

2chanFutaba
Futallaby is a PHP script based on the Futaba script from Futaba Channel.
Futaba Channel, or Futaba for short, also sometimes called 2chan (not to be confused with 2channel), is an imageboard in Japan.

Internet forum

forumforumsmessage board
An imageboard is a type of Internet forum that revolves around the posting of images, often alongside related text and discussion.
On these forums, a tripcode system may be used to allow verification of an identity without the need for formal registration.

Project Chanology

Chanologyleaked video interview of him promoting ScientologyOperation Reconnect
The site and its userbase have received attention from the media for a number of reasons, including attacks against Hal Turner on his Internet shows, distributed denial-of-service attacks against eBaum's World, taking part in Project Chanology, and multiple cases of anti-animal abuse reports.
Project Chanology was formulated by users of the English-speaking imageboards 711chan.org and 4chan, the associated partyvan.info wiki, and several Internet Relay Chat channels, all part of a group collectively known as Anonymous, on January 16, 2008 after the Church of Scientology issued a copyright violation claim against YouTube for hosting material from the Cruise video.

Pedobear

Many Internet memes have originated there, including lolcats, rickrolling and Pedobear.
Pedobear is an Internet meme that became popular through the imageboard 4chan.

Lolcat

LOLcatslolspeakCeiling Cat
Many Internet memes have originated there, including lolcats, rickrolling and Pedobear.
Lolcats are commonly designed for photo sharing imageboards and other Internet forums.

Bulletin board system

BBSbulletin board systemsBBSes
Imageboards, similar to bulletin board systems, are used for discussions of a variety of topics.

Rickrolling

RickrollrickrolledBarack Roll
Many Internet memes have originated there, including lolcats, rickrolling and Pedobear.
Rickrolling was reported to have begun as a variant of an earlier prank from the imageboard 4chan known as duckrolling.

Polandball

The site also featured a popular English-language board, /int/, which was also the origin of the Polandball internet phenomenon in August the same year.
It is an Internet meme which originated on the /int/ board of German imageboard Krautchan.net in the latter half of 2009.

Anonymous (group)

AnonymousAnonymous PhilippinesAnonymous hacktivist group
Anonymous originated in 2003 on the imageboard 4chan representing the concept of many online and offline community users simultaneously existing as an anarchic, digitized global brain.

Winnenden school shooting

Tim KretschmerWinnendena similar gun rampage
In 2009, after the Winnenden school shooting, the interior minister of Baden-Württemberg cited a post on the imageboard in a press conference that appeared to forewarn of the shooting, but was later found to be fake.
In a press conference on 12 March, police reported that Kretschmer had announced his killing spree several hours ahead of time on Krautchan.

Japan

JPNJapaneseJP
The first imageboards were created in Japan as an extension of the textboard concept. In Japan, where imageboards are more common, topics will vary widely, ranging from trains to current news.

Train

passenger traintrainspassenger trains
In Japan, where imageboards are more common, topics will vary widely, ranging from trains to current news.

News

current eventscurrent affairsNews program
In Japan, where imageboards are more common, topics will vary widely, ranging from trains to current news.

Image hosting service

image hostingimage galleryimage
Imageboards are also different from online galleries in that most of the works posted are not made by the poster, but instead are taken from other online sources: galleries, other imageboards, and edited pictures.

2channel

2ch2chan2 channel
Most imageboards and 2channel-style discussion boards allow (and encourage) anonymous posting and use a system of tripcodes instead of registration.

Hash function

hashhashinghashes
A tripcode is the hashed result of a password that allows one's identity to be recognized without storing any data about users.

Controlled vocabulary

controlled vocabulariesControlled-vocabularyvocabulary
There are two primary types of imageboard software packages in widespread use: linearly directed imageboards modeled closely after Futaba Channel (in which content is posted through hierarchical subsections of topical interest, usually denoted by a forward slash such as "/f" for female), and nonlinear imageboards modeled after Danbooru (usually indicated by the usage of controlled folksonomic vocabulary for topical tagging and search).

Folksonomy

folksonomiessocial taggingfolksonomic
There are two primary types of imageboard software packages in widespread use: linearly directed imageboards modeled closely after Futaba Channel (in which content is posted through hierarchical subsections of topical interest, usually denoted by a forward slash such as "/f" for female), and nonlinear imageboards modeled after Danbooru (usually indicated by the usage of controlled folksonomic vocabulary for topical tagging and search).

PHP

PHP5PDOPHP programming language
Futallaby is a PHP script based on the Futaba script from Futaba Channel.

Open source

open-sourceopensourceopen
It is mostly notable for being the first open source English imageboard script.

Perl

Perl 5Perl programming languagePerl Script
Wakaba is a Perl imageboard script with a SQL backend to store thread information.

Fork (software development)

forkforkedforks
A few users have attempted to remedy this by forking the original project and adding in features they consider beneficial.