to function,a computer system requires four main aspects of data handling : input,processing,output,and storage.the hard ware responsible for these four areas is as follows
- Input Devices accept data or commands in a form that the computer can use they send the data or commans to the processing unit.
- processor,more formally known as the central processing unit (CPU),has electronic circuitry that manipulates input data into the information people want.the central processing unit actually executes computer instruction.
-output devices show people the processed data information in understandable and usable form.
- storage usually means secondary storage,which consists of secondary storage devices such as disk hard disk or diskettes or some other kind of disk that can store data and programs outside the computer itself. these devices supplement memory or primary storage,which can hold data and programs only temporarily.