1. < software > A software source tree packaged for distribution; but see kit .
2. A vague term encompassing mailing list s and Usenet newsgroup s (but not BBS fora ); any topic-oriented message channel with multiple recipients.
3. An information-space domain (usually loosely correlated with geography) to which propagation of a Usenet message is restricted; a much-underused feature.
[ Jargon File ]