Usenet, or Unix User Network is a communications medium in which users read and post textual messages (called "articles") to a number of distributed bulletin boards[?] (called "newsgroups"). The medium is sustained among a large number of servers, which store and forward messages with one another. Usenet is of significant cultural importance in the networked world, having given rise to, or popularized, many widely recognized concepts and terms such as "FAQ" and "spam".
Usenet is one of the oldest computer network communications systems still in widespread use; it existed before the popularization of the Internet and well before the World Wide Web. Today, almost all Usenet traffic is carried over the Internet. The format and transmission of Usenet articles is very similar to that of Internet email messages. However, whereas email is usually used for one-to-one communication, Usenet is a many-to-many medium.
The articles that users post to Usenet are organized into topical categories called newsgroups, which are themselves organized into hierarchies of subjects. For instance, sci.math and sci.physics are within the sci hierarchy, for science. When a user subscribes to a newsgroup, his news client software keeps track of which articles he has read.
When a user posts an article, initially it is only available on that user's news server. Each news server, however, talks to one or more other servers (its "newsfeeds") and exchanges articles with them. In this fashion, the article is copied from server to server and (if all goes well) eventually reaches every server in the network. Some have noted that this seems a monstrously inefficient protocol in the era of abundant high-speed network access; it was designed for a time when networks were much slower, and not always available.
ISPs, News Servers, and Newsfeeds Most Internet service providers, and many other Internet sites, operate news servers for their users to access. To read news, one must use newsreader software -- a program which resembles an email client (and is often integrated with one) but accesses Usenet instead.
Not all Internet sites run news servers. A news server is one of the most difficult Internet services to administer well, because of the complexity and data throughput involved. Some ISPs outsource news operation to specialist sites, which will usually look just the same to a user as if the ISP ran the server itself. Many sites carry only a restricted newsfeed, with only a limited number of newsgroups. Commonly omitted from such a newsfeed are foreign-language newsgroups and the alt.binaries hierarchy which largely carries software and erotica.
For those who have access to the Internet, but do not have access to a news server, Google Groups[?] allows reading and posting of news via the World Wide Web. Though this or other "news-to-Web gateways" are not always as easy to use as specialized newsreader software -- especially when threads get long -- they are often much easier to search.
There are also Usenet providers which specialize in offering service to users whose ISPs do not carry news, or which carry a restricted feed. One list of such providers is available at http://www.exit109.com/~jeremy/news/providers/providers . There is even a newsgroup for the discussion of news providers specialized in the binary newsgroups -- alt.binaries.news-server-comparison.
Technical details Usenet is a set of protocols for generating, storing and retrieving news "articles" (which resemble Internet mail messages) and for exchanging them among a readership which is potentially widely distributed. These protocols most commonly use a flooding algorithm which propagates copies throughout a network of participating servers. Whenever a message reaches a server, that server forwards the message to all its network neighbors that haven't yet seen the article. Only one copy of a message is stored per server, and each server makes it available on demand to the (typically local) readers able to access that server. Usenet was thus one of the first peer-to-peer applications.
Internet Jargon and History Many terms now in common use on the Internet -- so-called "jargon" -- originated or were popularized on Usenet. Likewise, many conflicts which later spread to the rest of the Internet, such as the ongoing difficulties over spamming, began on Usenet.
(The Great Renaming should be discussed here!)
Early versions of Usenet used the B-News server software, and then later C-News. In the mid-1990s, INN was developed to take advantage of the way the Internet worked versus the store-and-forward design of UUCP. Since that time INN development has continued, and other news server software has also been developed.
The architecture of Usenet is sometimes characterized as anarchic or as civic/democratic. Some see it as global community[?] or collection of online communities. While the views varies, one shared perspective among the users is Usenet as an alternative medium[?] to institutionalized mass communication, more open to participation from a wider variety of the general public[?].
Usenet can be a tool boosting an individual's ability to communicate, free from governmental and other organizational restrains. Six major features that stand out are:
To some, these features are indications of how our society could become, or would likely become, when interactive information networks such as Usenet and the Internet becomes the dominant means of communication.
It is perhaps helpful to point out these analogies of the social aspect of Usenet are not necessarily compatible with each other. While anarchism tends to emphasize individual freedom and the 'anything goes' principle, community values mutual ties and corporation. Democracy usually requires a binding collective decision, running counter to anarchic principle. The correct interpretation is not clear even among those who study it.
There exist various indications that those analogies are either one-sided or wrong. The reality of how Usenet is used might be not as simple as some might imagine from above descriptions.
Communication on Usenet may be perceived by some (critics or users) as not very constructive, or worse yet, undesirable. It is frequently excessively aggressive, as some people engage in flame wars. The discussion might seem unproductive, with endless disputes. It may contain offensive languages[?] and very objectionable opinions on sensitive issues related to racism, gender roles, etc. The non-offensive messages might be or "spams," or unsolicited off-topic postings such as advertisements for pornography sites. A group may be flooded with messages by a very limited number of participants, being not very open and friendly to newcomers. In addition, the most active part of the Usenet include exchange of pornographic files (especially pictures) and music files (especially in MP3 format).
In addition, the said freedom in the alt hierarchy is limited in that unless a newly created newsgroup meets certain conditions and goes through certain procedures, it will not be carried by many news servers, potentially resulting in a wasted effort. In general, the seemingly anarchic system is indeed not without some administrative-level controls. The bucket-relay like structure of the network is even more limited because of the existence of the so-called Big Seven[?], the major carriers of news groups to which many smaller-scale news servers connect. These carriers exert influence on newsgroups' birth and survival as well.
It is also noticeable that there is an obvious hierarchy in the way newsgroups are organized. While some of the other interfaces for online communication support much less hierarchical organization of information, such as the World Wide Web, Usenet is not one of them.
The more general criticisms that apply to Usenet and many other kinds of online communication include the statement that usenet is mostly a text-based medium, empowering the literate and articulate, while being less accessible to others.
The issue of the digital divide,namely that some people simply do not have access to the Internet, is another reason one might point out that Usenet is not entirely democratic or open.