The input-output system of a computer consists of the programs and devices that allow the machine and its user to communicate. Recently graphical devices for this purpose have evolved rapidly ...

Every peripheral device (keyboard, modem, monitor, etc.) requires a control circuit that interfaces with the computer's processor (CPU). These circuits are either built into the chips on the ...

Your commands, ideas, demands and concepts form the data your system processes and stores. Without user input, a computer simply takes up desktop space and waits for directions, like a lost motorist ...