Mactracker - Provides a program that will list every Macintosh ever built and the hardware specifications of each machine.

Apple Spec Database - Specifications on many models of Macintosh hardware.

Disassembly of an Apple Pro Keyboard - Ripping apart an Apple Pro Keyboard and giving it a thorough cleaning is presented in painstaking detail.

Engadget: Turn your Mac mini into a media center - Covers the various aspects to think about when planning a Mac mini media center system, plus shows how to control a Mac mini headlessly from any computer in the house.

EveryMac.com - A complete guide to every Macintosh and Mac clone with technical, configuration, and pricing details. Technical specifications and questions and answers.

Gear Live - Why Apple Makes a One Buttoned Mouse - Apple system software has supported a multiple-button mouse for many years, but here's some reasoning behind them selling one-button mice.

Hardware Developer Documentation - Apple's developer's documentation for hardware including computers, cards, and peripherals.

HP - Macintosh Compatible Products - Direct link to a listing of everything sold by Hewlett-Packard that works with a Mac.

iFixit - Do-it-yourself Apple laptop repair guides viewable online or as PDF documents with photographs to augment the instructions.

MacGurus Motherboards Database - Mac motherboard layouts for Macs prior to the Power Mac G5.

MacInfo.de - PowerPC Mac hardware information, benchmarks, and test results. In English and German.

MacWorld's Mac Hardware Guide - MacWorld magazine's reviews and ratings of Macintosh hardware.