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 You have to have a keyboard to type stuff into the computer. Without the keyboard or the mouse you can't do anything. Most important it has to have a memory to save and load stuff to hard drive. The results are easy to get.

I was using my PlayStation 3 and i was playing with the system or CPU (Central Process Unit) and i was playing expert. The mother-board is the controller because without it you can't play or control the PS3 (PlayStation 3). The input device is when you put a USB or a charger. The output device is the controller because it is wireless, the mouse, and the keyboard.