Hardware Guide/infomation/how it works/ why?

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1.Random Access Memory (RAM) Technology Guide
www.makeitsimple.com/sections.php?artid=9

2.Hard Disk Drive (HDD) - Guide
www.makeitsimple.com/sections.php?artid=10

3.Quick and Dirty: Hubs, Switches, and Routers
www.makeitsimple.com/sections.php?artid=12