Master and Slave

Plz tell me how master and slave work together. Also tell me how a jumper works, plz be specific about it what happens when you actually move the jumper that changes the setting. Also what is a regular computer case made out of? And plz tell me what ZIF is and what it is used for.

Thx.

I think you should try to find it yourself.
Here is some help.

http://computer.howstuffworks.com/ide4.htm
**broken link removed**
**broken link removed**
http://www.waterwheel.com/images/r0300049.jpg

:?
STEVE