Primary 3 ICT SECOND TERM WEEK 1 What is a Computer

What is a Computer?

A computer is an electronic device that accepts data as input, processes it and brings out information as output.

Basic parts of a computer

Monitor, Keyboard, Mouse, CPU (System Unit), UPS (Uninterrupted Power Supply), USB drive, Speakers, Projector, Printer and scanner.

Classes of Computers

Super Computers Mainframe Computer Mini Computer Micro Computer

Touch Typing

THE HOMEKEYS: A S D F SPACE BAR, SPACE BAR J K L ;

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Types of CPU (Central Processing Unit)

Description: http://vignette2.wikia.nocookie.net/computer/images/6/67/CPU.jpg/revision/latest?cb=20131023131812&path-prefix=enVertical CPU (Tower Computer)

This type of CPU is in a standing position

Horizontal CPU (Desktop Computer)

This type of CPU is usually in a lying down position. Usually placed on the table and the monitor placed on top

Main Units of the CPU (Central Processing Unit)

  • Control Unit: It controls other units within the CPU. It is the brain within the CPU.

  • Arithmetic Logic Unit: It is the part of the CPU that performs arithmetic (mathematical) and comparison operations.

  • Memory Unit: It is used to store data.