Introduction to Computer

A computer is an electronic device which takes input through input device; it gives output through output device.

-          It also stores data for further processing.

-          Computer works with “0”, “1” (Binary Language).

-          Like all electronic device computer works with DC power.

Block Diagram of Computer.

  HARDWARE COMPONENTS

Components of Computers

-          Processor

-          Motherboard

-          Primary Storage Device

i)                     RAM (Random Access Memory)

ii)                   ROM(Read Only Memory)

-          Secondary Storage Device

i)                     HDD (Hard Disk Drive)

ii)                   Optical Device (CD Rom, DVD, etc)

iii)                  Floppy Device

-          SMPS (Switched Mode Power Supply)

-          Input Device

i)                     Keyboard

ii)                   Mouse

-          Output Device

i)                     Monitor

PROCESSOR & PRIMARY STORAGE DEVICE

Processors

-          It is the brain of the computer

-          It is a semi-conductor device

-          It contains the complete CPU (Central Processing Unit) in a single chip.

-          It perform arithmetic an logical function

Processor Specification

-          Speed                                                   (measured in Hz (Hertz))

-          Width                                                    (measured in bits Ex: 8bit, 16bit, 32bits or 64bits)

-          FSB Speed(Front Side Bus)              (measured in Hz)

-          Cache Memory                                 (measured in Kbytes(Kb)/Mbytes(Mb))

*Note: - Detail about “Bits” and Kb, Mb is below.