The official FAQ of Usenet newsgroup comp.software.config-mgmt.

This URL takes you to a compression FAQ that explains compression to technical people as well as describing the various programs, and what they do to users.

General information about the Usenet newsgroup comp.graphics.rendering.renderman and the RenderMan software package, including the procedural interface, other implementations of the standard, third-party front ends, and some usage details.

Short essay on the development of Usenet architecture.

Frequently Asked Questions covering Eudora software for the Macintosh versions: pre-3.x, 3.x, and 4.x/5.x.

A general introduction to mail filtering on Unix, with information about Procmail, filter, and mailfilter. (Slightly old and apparently no longer maintained, but still an excellent introduction.)

Lots of email servers as in last updated 1995.

ELM, and PINE MUSH, various package reviews. This FAQ might be old, but then again I still use pine. It is part two of three parts with links to parent and sister articles.

The comp.groupware FAQ file.

LAN Mail protocols summary.