Lesson Notes By Weeks and Term - Junior Secondary School 2

SUBJECT: ICT

CLASS:� JSS 2

DATE:

TERM: 1st TERM

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WEEK TWO

TOPIC: THE COMPUTER SYSTEM

The concept of computer system

A computer system consists of mainly four basic units such as input unit, storage unit, central processing unit and output unit,

COMPONENTS OF COMPUTER SYSTEM

A computer system comprises of three basic components. These are Hardware, software and people ware.

HARDWARE�

Definition�

Hardware is any part of the computer that you can physically touch, pick up, hold, and move around. In other words, hardware are the physical parts that make up the computer.�

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Examples of external hardware (outside the computer):

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• Monitor: To see what you are working on�

• Printer : To print� a paper copy of your work�

• Keyboard : To type text, numbers and symbols into your work�

• Mouse: To� point, click and select things on your screen�

• Microphone :To� input voice or sound recordings�

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Examples of internal hardware (inside the computer):

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• Hard disk :to store all of your applications and files�

• CPU (Central Processing Unit) : the 'brains' of the computer�

• Fan : to keep the CPU cool and stop it overheating�

• Motherboard : the main printed circuit board in the computer with sockets to connect the other parts�

• Sound card:� used to generate and capture sounds

• Processor and memory stick

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SOFTWARE���

Definition�

Software is a set of instructions or programs written in a computer language that tells the hardware what to do. Without software, most hardware would be useless.

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PEOPLE WARE

�People ware refers to the role of people in the development or use of computer software and hardware systems.