Glossary

I found a helpful site with glossary of terms related to computers:

http://www.channelstorm.com/Manual/Data/GL00/GL00.htm

This site has helped me understand what firewire is as well as USB...
it also has other terms which are helpful to other computer related bits.

**edit**
A better site with good terms as well:

http://www.usbman.com/glossarycomputerterms.htm

Includes such terms as USB, and USB 2.0, Serial port, etc...

***edit number 2***

Better than site number 2 is this glossary site:
http://www.flw.com/define_p.htm

Gave me a diffinition on ports and various other things