Newsgroups are organized into category hierarchies of names and dots, which are read right to left. For example, alt.music.jazz means the jazz music topic in the alt (alternate) category. Categories are often designated with an asterisk to represent all topics; for example, talk.* means "talk.all," or the entire Talk category (see wild cards).
The Alt category is the most varied. The least moderated of newsgroups, Alt contains a huge number of topics, including x-rated material. The alt.binaries category is used to share non-text files, including software, images and videos. Following are the major categories. See newsgroup and Usenet.
Category Subjects alt varied, x-rated alt.binaries non-text (images, videos) biz business (ads allowed) comp computer (technical issues) misc miscellaneous news technical issues about Usenet rec recreation (sports, travel, etc.) sci science and medicine soc social issues talk debates, controversial topics
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