Before there were {{Message Board}}s, Wikis or the World Wide Web, before the Internet even existed in its present form [[note]]which started around 1983, after the introduction of TCP/IP and DNS[[/note]], there was Usenet, one of the first distributed discussion systems around. Until the rise of Web-based forums after 2000, Usenet was ''the'' place to discuss things on the Internet, and quite a few tropes regarding message boards in general started here.

Usenet began in 1979, when programmers at Duke University realised that UsefulNotes/{{UNIX}}'s ''uucp'' (Unix to Unix [=CoPy=]) program, which was already being used to transfer email between sites, could also be used to transfer broadcast messages between sites (the original idea was to enable "community calendar"-style announcements, hence "news") and allow for discussion areas, which they decided to call "newsgroups". Eventually, as access to the Internet became more common, ''uucp'' was replaced by the Network News Transfer Protocol, and in 1985, the system itself was reorganised into 7 branches (the "Big 7") in an event called the "Great Renaming". An 8th, ''humanities'', was added later.

The current Big 8 are:
* ''news'': Discussion about Usenet itself, including proposals for new newsgroups, anti-spam activism, etc.
* ''talk'': Discussion of various controversial issues, such as evolution ('''') and abortion (''talk.abortion'').
* ''sci'': Scientific discussion not related to computers, including math, engineering, physics, biology and astronomy.
* ''comp'': Computer science and IT discussions, including {{operating system}}s, hardware and applications.
* ''soc'': Sociology and culture-related discussions.
* ''humanities'': Humanities (literature and fine arts) discussion.
* ''rec'': Recreational activities, hobbies, and sports discussion.
* ''misc'': Anything that doesn't fit the other 7 categories, but mostly used for lifestyle discussions (groups include things like '''' and ''misc.consumers''). ''misc.misc'' is often used as a test-message area.

Outside the Big 8, but no less important:
* ''alt'': Usenet's equivalent to [[ImageBoards 4chan]], right down to having 4chan's bad reputation; one old joke expands "alt" to "anarchists, lunatics and terrorists" due to the huge number of {{Single Issue Wonk}}s and {{Cloudcuckoolander}}s that were (and, in several places, still are) present. Basically, anything goes here; topics range from serious discussions of technical issues that didn't fit inside the ''comp'', ''sci'' or ''talk'' branches, to "vanity" newsgroups created as a one-off joke and now picking up nothing but spam, something that's been discouraged since the mid-1990s but still happens nonetheless. Just like 4chan, it includes many, many groups (specifically those under the '''' sub-branch) solely dedicated to images -- [[TheInternetIsForPorn and by images, we mean "porn".]] There used to be groups dedicated to pictures of all types, but the Web in general (and Google Image Search in particular) has made them obsolete. As for discussions, popular sub-branches include '''', ''alt.religion'' and, of course, ''alt.flame'' (Usenet's equivalent to /b/).
* Various regions and domains may have their own private or semi-private branches, such as ''vt'' (for Virginia Tech) or ''microsoft.public'' ([=Microsoft=]'s official tech support forums).

Due to various legal and financial pressures (the former due to its use in copyright law violations; the latter because Usenet requires lots of bandwidth and storage space, more than its dwindling numbers of users can justify), Usenet has become less accessible over time. Many major internet providers have either limited access to Usenet, usually by refusing to carry ''alt.binaries'', or have shut down their Usenet servers completely. To fill the gap, specialist Usenet providers have appeared, and many [=ISPs=] simply outsource Usenet access to them. Probably the easiest way to access usenet is through Google Groups, as awkward and buggy as it often is.

Given Usenet's oft-predicted imminent death, it's perhaps ironic that one of the most active Usenet groups of the 2010s is alt.obituaries, where obituary writers and fans hang out.

[[TropeNamers Gave the name to]] EternalSeptember. The term {{Roguelike}} was also coined on Usenet as the newsgroup for the genre needed a name.

!!Usenet in fiction

* The galaxy-spanning communications network in Creator/VernorVinge's ''Literature/AFireUponTheDeep'' is modeled on Usenet, and the idiosyncratic writing styles of some of the characters are [[AffectionateParody inspired by]] some of Usenet's regular contributors back in the day.
* The ''Literature/LegionOfNetHeroes'' was created on Usenet, and still lives on the newsgroup rec.arts.comics.creative. A lot of early LNH characters have usenet-based gimmicks and powers, such as [[ Sig.Lad]] and [[ Dr. Killfile]]. The LNH cosmology is also based on usenet; each newsgroup is an alternate dimension and characters often travel between them.
* Usenet was once more shown as a binding force in an episode of ''WesternAnimation/TheSimpsons'' where upon being asked by Bart who's starring in the upcoming Radioactive Man film adaptation, Comic Book Guy goes off to log onto a group called alt.nerd.obsessive in order to go find out through a chain of dedicated geeks. This was a ShoutOut to fan newsgroup which the show's writers read at the time and even now alt.nerd.obsessive (created as a result) still receives requests of "need to know star RM pic".
* When ''WesternAnimation/KingOfTheHill'' breached the subject of the Internet in an early episode, [[ConspiracyTheorist Dale Gribble]] mentioned that he perused the newsgroup "". As with the ''Simpsons'' example, there was a newsgroup created with the name "" as tribute to the show.