NewsThreads

Not sure what to call them...

Keywords: threaded discussion groups forums bulletin boards newsgroups usenet netnews bulletin boards groupware ...

i.e. http://www.hudsonic.com/cgi-bin/yabb/YaBB.cgi (or http://home.jtan.com/~hudsonic/cgi-bin/yabb/YaBB.cgi if DNS is flaking)

see also TechNotes on ThreadedDiscussions?