Hardware Documentation - Machines
Here are some links to information about Apple Macintosh computers.
Apple's information on all models
Device section from Technical Q&As portion of the Apple developer site. Covers writing Mac OS Macintosh device drivers.
Technical hardware questions and answers on the Apple developer site.
Firmware updates for newer PowerMacintosh computers
Answers to a wide variety of questions from Apple
A good set of MacBSD links to apple machine specifications and details.
Mainly user, maintenance, and upgrade related FAQs
How to speed up most macintoshes by undertiming (or 'overclocking').
Basic specifications of all the (many) macintosh models.