Learning about the computer

Hi 4chan, i've been using a computer for a long time now, but i know crap about them. is there a site or anything i can go on to that has basic information about computers? like the parts of the computers, ex: ram, video card, processor, and so on. Thanks.

Wikipedia could be a good starting point. Pick a topic and follow links.
http://en.wikipedia.org/wiki/Desktop_computer