Various Part of a PC.

     A PC consists of electronic components connected to various peripherals and accessories that let users send data to the computer (input) or receive information from the computer (output). Although PCs vary in shape, size, capacity, speed and price, they all include elements that enable them to perform the following essential tasks:

1. Receive data
2. Save data
3. Manipulate data in various ways and
4. Generate result after processing data

  Computers receive most data from either the keyboard or a hard disk. Data is manipulated and changed (processed) by the microprocessor, and the resulting output is either displayed on a monitor or printed on paper. However many computers may include additional components such as scanners, modems, magnetic tape drives, sound cards and so on.
  The system unit, monitor,keyboard, mouse, etc. are the essential components of a computer are built with electronic circuits. The electronic components and internal connection within the system unit of a computer are discussed below:

1. Monitor : It displays both data entered by the user and information processed by the computer.
2. Keyboard : It enables users to enter data or to type commands in order to perform specific operations.
3. Mouse : It lets users communicate with the computer by pointing at graphical objects on the screen, and then clicking a button to execute a command or display information.
4. Printer : It lets users take a hard copy of information by transferring the results of their work onto paper.
5. Motherboard : It is the large printed circuit board inside a computer that carries and connects all of the principal electronic components, such as the microprocessor and memory.
6. Floppy Disk Drive : It reads and writes data on removable magnetic diskettes, thus enabling users to transfer information between computers, make copies of data for bachup purpose, and install new programs.
7. Power Supply : It transforms the 220-volt alternating current of electrical outlets into low-voltage direct current required by sensitive electronic components and peripherals.
8. Expansion cards : Also called interface cards, they connect peripherals (such as monitors,disk drives and so on) to the PC's motherboard. They are essential for transferring and translating data to and from electronic devices.
9. Hard Disk : It is the main storage area of a PC. It can hold huge amount of programs and information in magnetic form. It retains data even when the computer is switched off.
10. CD/DVD Drives : A CD-ROM (Compact Disk Read Only Memory) rive uses disks for the CD-ROM drive is known as CD or CD-ROM disk. Data contained on these disks are audio files, Software applications and graphic. Combo drives are also fitted that contain DVD and CD drive.