Internet Discussion Forum on a Specific Topic

This page is the CodyCross answer for the clue below from Underground Worlds, Group 2164, Puzzle 2 (Stalactites).

Question is: Internet Discussion Forum on a Specific Topic

and the answer is: NEWSGROUP

Word Meaning:

NEWSGROUP — A repository on a computer network where people can post messages, usually about a single subject.

Definitions from Wiktionary.