A daughtercard is also called a daughterboard.

See "What You Need to Know About Motherboards" in the Quick Reference section of Webopedia.

Microprocessor Comparison Chart
A cut-to-the-chase guide that compares and contrasts popular processing chips.

Sharky Extreme
Reporting on the latest hardware and software technology for the PC enthusiast.

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What You Need to Know About Motherboards
You can think of the motherboard as a communications center. The purpose of the motherboard is to provide the means for all the other components and peripherals to talk to each other.