Newsgroup

Newsgroup
A newsgroup (also called a forum), is an on-line discussion group. On the Internet, there are literally thousands of newsgroups covering every conceivable interest. To view and post messages to a newsgroup, you need a News reader, a program that runs on your computer and connects you to a News server on the Internet.

Google Groups provides an indexed Search facility that can find messages posted to many news servers, and allows the user to Post messages to join the discussion. The disadvantage is that Google Groups is always several hours out of date, so it is better to use a News reader for newsgroups where you are actively posting and reading messages.

(From Webopedia)

Linux

 * comp.os.linux.answers
 * comp.os.linux.announce
 * comp.os.linux.advocacy
 * comp.os.linux.apps
 * comp.os.linux.development.apps
 * comp.os.linux.development.system
 * comp.os.linux.hardware
 * comp.os.linux.networking
 * comp.os.linux.setup
 * alt.os.linux
 * comp.os.linux.misc
 * alt.os.linux.debian
 * alt.os.linux.slackware
 * comp.os.linux.alpha
 * comp.os.linux.powerpc
 * comp.os.linux.m68k

X-Windows

 * comp.windows.open-look
 * comp.windows.x
 * comp.windows.x.announce
 * comp.windows.x.apps
 * comp.windows.x.i386unix
 * comp.windows.x.intrinsics
 * comp.windows.x.motif
 * comp.os.linux.x