noun
newsgroup
Refers specifically to Usenet newsgroups, a now largely historical Internet discussion system. Still encountered in technical or retro-computing contexts.
昔はニュースグループでよく議論したものだ。
Back in the day, we used to discuss things on newsgroups.
掲示板 is a general term for bulletin boards or online forums, while ニュースグループ specifically refers to Usenet newsgroups.
フォーラム is a broader term for online discussion forums, not limited to the Usenet protocol.
Loanword from English 'newsgroup'.