Computer Information and Magazines
Motherboards.org has information and reviews on almost all motherboards.
Computer History Museum
Old-Computers.com the most popular website for old computers. Have a trip down memory lane re-discovering your old computer, console or pong you used to have.
Gruntville has tons of information on computer modifications including overclocking.
I-hacked.com is a website devoted to hacking hardware to make it better and or faster or something else entirely. Example: upgrading a Canon EOS 300D so that it has the same features as a Canon 10D.
Windows & .NET Magazine Network
Bedford Magazines website has back issues of their computer magazines (PC Upgrade, Laptop, Computer Buyers Guide).
Online Computer Stores
Cricial Memory manufactures memory chips and also sells them online.
PC Certify has become a world leader in providing top-value computer maintenance tools to technicians, systems builders, students, schools, and end users. Our product focus has been test cards, PC diagnostic software, and data recovery software.
Computer and Component Manufacturers
IBM is the only computer manufacture that has detailed disassembly and reassembly manuals and part numbers for all the computers they manufacture and sell.