What are newsgroups?

Newsgroups are named channels on Usenet where articles are posted. Each group has a hierarchy (like a path) and a purpose—from discussion threads to binary file distribution.

How names work

Names use dots, for example alt.binaries.multimedia or news.software.readers. The first segments indicate the top-level category (alt, comp, news, etc.). Deeper segments narrow the topic.

• Text groups — Mostly human-readable posts and replies (like a mailing list).
• Binary groups — Large files split into encoded articles; clients rebuild them after download.

Articles, threads, and subjects

Each post is an article with headers (subject, date, message-id) and a body. Threads link related articles. Binary posts often use opaque subjects; NZB files point clients directly to the required articles.

Do I browse groups manually?

Historically, users subscribed to groups in a newsreader. Today most binary users rely on indexers that publish NZBs referencing specific articles. Your client still downloads from newsgroups on the server, but you rarely pick groups by hand.

Groups on Hydra Usenet

Hydra carries a broad set of groups via upstream networks. You connect with one hostname; the server exposes the groups it mirrors. Connection settings are in the member panel.

Related: What is Usenet? · Glossary