In recent years, the term PC has become more and more difficult to pin down. In general, though, it applies to any personal computer based on an Intel microprocessor, or on an Intel-compatible microprocessor. For nearly every other component, including the operating system, there are several options, all of which fall under the rubric of PC

(2) PC can stand for printed circuit, so a PC board is a printed circuit board.

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GlobalSpec.com: Desktop Computers - Database of suppliers for desktop computers. Browse catalogs, view technical information, and contact suppliers.

Building Your Own PC 
What hard-core techies and companies like Dell and Compaq have been doing for years is what any computer user can learn how to do - build a computer from scratch. Let SE take you on a stroll through the park and ease the pain of building a DIY PC.

The PC Technology Guide 
Aimed at the hobbyist or interested novice, this guide covers the various technologies underlying the PC's major internal components and peripherals. Includes many explanatory graphics and diagrams.

PC Guide 
PC hardware reference site containing sections on systems and components, maintenance and care, and technical resources, as well as troubleshooting, repair and optimization tips and techniques.

PC Mechanic - online guide to computer hardware 
Contains overviews, purchasing and installation information for PC motherboards, memory, drives, expansion cards, and power supplies. Also contains links to companies and manufacturers and PC hardware related links.

Build Your Own Computer
Instructions and advice on building your own computer. Includes sections that describe how to configure, install, and remove various components. This page is hosted by the PC Mechanic.

PC performance and upgrade tips
Provides many links related to enhancing system performance, upgrade tips and installation help.

Physical Installation Procedures
Covers procedures that are related to the physical installation of hardware devices. This page is from "The PC Guide."

Price Watch - street price search engine
Offers a way to find prices on computer products (systems, CPU, memory, storage, networking, multimedia, etc.) from many manufacturers. Prices are entered by the manufacturer using a proprietary Price Watch Info-Link system. Users then see a date and time posting with each product chosen.

Illustrated Pentium II and Celeron Building Guide
Contains over 50 step-by-step photographs of assembling an ATX system with a Pentium II or Celeron processor. The site also include a large text section titled "Catching up with the New Technology" for those new to ATX.