[Usenet, GEnie, CompuServe] 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.
topic drift « topic group « topic map « topic
» top-level domain » topology » TOPS-10