what is system computer?

Well, how technical do you want to get? An input device is what you use to put information INTO a computer....the keyboard, mouse, webcam, etc. The output device is what the computer put's OUT for you to access, such as the monitor and printer. Storage devices are just that, a media to store information, such as your Hard Drive, and (if you got a CDRW-Compact Disc Re-Writeable drive) when you burn a disc. There is a program called Belarc Advisor, a freeware program that can be downloaded at http://downloads.com, that can show you the hardware and software profile that is in your computer.