:thread: n. [USENET, GEnie, CompuServe] Common abbreviation of
`topic thread', a more or less continuous chain of postings on a
single topic. To `follow a thread' is to read a series of USENET
postings sharing a common subject or (more correctly) which are
connected by Reference headers. The better newsreaders can present
news in thread order automatically.
-- The AI Hackers Dictionary
BBS: /B-B-S/ [abbreviation, `Bulletin Board System'] n. An electronic
bulletin board system; that is, a message database where people can
log in and leave broadcast messages for others grouped (typically)
into {topic group}s....