The three basic  task of the computer is the input device, output deice, and the data process and obtained. I think that the input of a device  is a device like a folder were you can save stuff but you can not share it on other computer with out a out put device. Now a out put device is like a USV  that you can put the folders  in the USV and you can share it on other computers. Now a Data processed to obtain the information is the mother board. A mother board is all of the stuff inside of the computer all of the electric stuff inside of the computer.