Module 2 Computer System

! PUSAT PERKEMBANGAN KURIKULUM KEMENTERIAN PELAJARAN MALAYSIA

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MODULE 2 OVERVIEW OF THE COMPUTER SYSTEM

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Curriculum Development Centre Ministry of Education Malaysia

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1.

Name of Module :

2.

Learning Outcomes: The students should be able to:

3.

4.

Computer Parts and Components – Overview of the Computer System

a.

identify the main components in the computer system

b.

state the functions of the main components in the computer system

c.

explain briefly the data processing cycle of a computer system

Knowledge and Skills: a.

identify the main components of the computer system

b.

state the different functions of the main computer components

Module Summary:

At the end of the module, students should be able to identify

and state the functions of the main computer components and explain the data processing cycle of a computer system.

This module contains 3 activities: Activity 1:

Identify the main components in the computer system and their functions.

Activity 2:

Explain the data processing cycle of the computer system.

Activity 3:

Name and state the computer components and their functions.

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Activity 1 MAIN COMPUTER SYSTEM

monitor system unit speaker

keyboard

mouse

Monitor A computer monitor is like a television monitor that displays images. The different types of display screens are: •

Standard television set An ordinary home television that can be used for computer output.

•

Standard computer monitors These monitors have better resolution than TV monitors.

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•

Liquid Crystal Displays (LCD) These screens are made up of two glass plates with liquid crystals in between .

Keyboard

Multimedia keyboard

Wireless keyboard

The keyboard is the main input device for text and commands. The computer keyboard uses the same key arrangement as typewriters, containing standard function keys such as “ Cursor movement and Control keys”. Keyboards come with three (3) different types of ports such as a. Serial port:

b. PS/2 port:

c. USB port.

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Speakers

Computer speakers give out information in the form of sound. These speakers range in quality and price. Computer speakers are typically packaged with computer systems in small plastic boxes with average sound quality.

Mouse

PS/2 port mouse

The mouse is an input device that sits on the work surface beside the computer. It is a small object that has right click, left click and double click for functions. The user uses it to control the movement of the cursor or pointer on a display screen.

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USB port optical mouse

Cordless optical mouse

An optical mouse uses camera technology and digital processing to compare and track the position of the mouse, rather than a ball and rollers in the older mouse A small LED (lightemitting diode) provides light underneath the mouse, helping to highlight slight differences in the surface. It does not require regular cleaning. Another benefit is that digital processing is it does not require a mouse pad and can be used on many surfaces. (source : http://images.search.yahoo.com)

System Unit

A system unit, also known as a base unit. It is the main body of a desktop computer. It consists of a metal or fibre enclosure containing the motherboard, power supply, cooling fans, internal disk drives, memory modules and expansion cards that are plugged into the motherboard, such as video and network cards. (source : http://en.wikipedia.org/wiki/System_unit)

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Printer A computer printer is a device that prints a hard copy of documents and graphics stored in electronic form onto paper. Printers are computer peripherals that are attached by a printer cable to a computer which serves as a document source. Below are three examples of printers : Dot-Matrix printer

The dot matrix printer is an impact printer. It works like an automatic typewriter. It is a lowcost printer with low quality output. Ink-Jet printer

The ink jet printer is a low-cost printer that produces mid-quality output.

Laser printer

The laser printer uses a laser beam to produce high quality prints.

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Activity 2 Data Processing Cycle The computer system processes data into information through four operations; input, process, storage and output.

Input

Output

Storage

The user enters the data by using an input device electronically and is processed by the processor. In the processing operation, data is manipulated to process into information. Storage (such as hard disk, compact disc, diskettes) holds data, information and programs. The output devices (such as monitor, printer) presents the processed data as useful information products to the user.

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Activity 3 Exercise 1 Label the pictures below. Write your answers in the boxes given.

1.

2.

5.

3. 4.

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Exercise 2 Look at the pictures given in Column A. Then, name the components of the computer and state their functions.

COLUMN A

COLUMN B (Component name and function)

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Exercise 3 Complete the data processing cycle of a computer system below.

Input

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Reference Cashman, S. (2006) Discovering Computers 2006. USA : Thomson Course Technology. Ibrahim Ahmad, Mohd Hafiz et al (2007) Information and Communication Technology (ICT) Based on SPM Syllabus. Selangor: Venton Publishing (M) Sdn Bhd. NCC Education (2002) Computer Studies, Computer Ace. Sri Lanka : Computer Pioneers. Basic Computing (2003) by TMEdu Tech (M) Sdn Bhd http://www.wikipedia.org http://images.search.yahoo.com http://www.google.com.my

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