A computer does mainly the following four functions:

• Recive input -Accept data/information from outside through various input devices like the keyborad, mouse, sacnner, printer, etc
• Process information - Perform arthmetic and logical operations on data/information.
• Produce output -communicate information to the outside world through output devices like monitor, printer, etc
• Store information - Store the info in storage devices like hard disk, floppy disks, CD, etc

These are 4 basics functions responsible for everything that computer do. The hardware components of the computer specilaize in any one of these functions.

computer hardware fall's into two categerious: processing hardware, of consist of the central processing unit. and the phereprical devices.phereprical devices allow people to interact with the CPU.