It is the process of feeding data and instructions to a computer system
It is the process of saving the data and instruction for the use of the system as and when required.
It is the way of carrying out arithmetic(addition, subtraction, multiplication and division) or logical(comparison) operations on data in order to convert them to useful information.
It is the process of presenting the final result for the user in printed or visual display format.
Keyboard, mouse, joystick, scanner smartcard, microphone.
RAM, ROM, PROM EPROM, Flash.
Display Screen, Printer, Plotter, Speaker.
Magnetic disk, Optical disk, Solid state memory.
Indicate control flow for proper operation
It is the most important operation of the computer in which all four operations described above are coordinated and synchronized.
Though the internal architecture of different computers vary from one system to another, the basic organization remains the same. The block diagram given here may instill a basic idea of a modern computer system and its working.
We shall now discuss briefly the structure and working of different sections of a digital computer as shown in the previous diagram.