Sunday, 20 May 2012

BASIC COMPONENTS OF COMPUTER SYSTEM

BASIC COMPONENTS:

There are four basic components of a computer system which are explained below.
  1. Input Devices
  2. Processing Devices
  3. Output Devices
  4. Storage devices
  • INPUT  DEVICES:

The data that is given to computer system is called input. Input devices are used to input data and instructions to a computer. These devices send  this data to processing unit.most commonly used input devices are mouse and keyboard.
  • PROCESSING  DEVICES:
The processor is used to process data.it is also called central processing unit(CPU). It is the Brain of the Computer. It consists of electronic circuits. CPU interprets and executes program instruction. All computers must have a central processing unit.
Main memory is used to store the input data before processing. It also stores processed data after processing until the data is sent to the output device. The main memory is closely connected to CPU but is separate from it.
  • OUTPUT  DEVICES:
The data processed into useful information is called output. Output devices are used to display the result of processing. The most common output devices are monitor and printer.
  • STORAGE  DEVICES:
Storage usually refers to secondary storage. The main memory stores data and programs temporarily . The secondary storage is required to store data,information and programs permanently. The most common storage floppy disk,hard disk drive and CD-ROM etc......