the OpenBSD CD errata page

Security advisories and updates (patches) for all supported versions.

Includes documentation of the 6502/6510/8500/8502 instruction set, errata for BBC Micro manuals, Acorn application notes, and WD1770 disk controller programming information.

This site provides order information, updates, errata, supplementary information, chapter bibliographies, and other information for the Handbook of Applied Cryptography by Menezes, van Oorschot and Vanstone.

A system information utility designed especially for detection of hardware. The program displays all the components hierarchically and generates a log file. DOS version available too.