This document discusses the key components of a computer system. It identifies the main components as hardware, software, and warmware. A computer system performs four main tasks: receiving input, storing information, processing data, and outputting information. The document then examines the components that facilitate these tasks in more detail, including input devices, the processor, output devices, and storage. It provides examples of common input, processing, output, and storage devices and their functions.

1. CPD 2113
TECHNOLOGY IN ELT
Chapter 2
COMPONENTS OF
COMPUTER SYSTEM
MURNI SALINA
B.Sc. Ed (TESL) UTM, Skudai
M’sia

2. COMPONENTS OF A
COMPUTER SYSTEM
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A computer system has three main components
:
◦ Hardware
◦ Software
◦ Warmware
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A computer system performs 4 important tasks
(Sharp, 2005:35)
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Receiving input : figures, facts or sets of instructions
Storing information : place in memories
Processing the data : act on the information
Outputing the information : process and generate
results

3. 4 MAIN ASPECTS OF DATA
HANDLING
1.
2.
3.
4.
Input devices
- accept data or commands in a form that the computer can
use: they send the data or commands to the processing unit.
The Processor
- known as CPU, has electronic circuitry that manipulates
input data into information that people require. The CPU
execute computer instructions.
Output Devices
- display the people the processed data; information in
understandable and usable form
Storage
- means secondary storage; consists of secondary storage
devices such as hard disk, diskettes, pendrives.
- can store data and programmes outside the computer itself.
- these devices supplement memory or primary storage, can
hold data or programmes temporarily.

4. 1. What is Input?
Input refers to any data or instructions
that are used by a computer. All
computer processing requires data.
Whenever you use computer or
application software, you are providing
input. You typically use a keyboard to
type text and a mouse to issue
commands.

5. Input Devices
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Keyboard
Mouse
Joystick
Touch Screen
Light Pen
Scanner
Bar code readers
Digital cameras
Video cameras
Graphic tablets
Voice recognition systems

6. 2. What is Process?
The computer manipulates the data to
create information.
Information refers to data processed into
a form that has meaning and is useful.

7. Processing Devices/System
Units
Mother board/System
 CPU/Microprocessor
 Memory – RAM, ROM
 Expansion Slots and Cards
 System Clock
 Bus Lines
 Ports and Cables


8. 3. What is Output?
Is a processed data or information.
Output devices provide output to people
by translating what the computer has
processed into a form that people can
understand and use.

9. Output Devices
Monitor – CRT, LCD
 LCD projector
 Video scan converter
 Printer
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10. 4. What is Storage?
Information can be stored in a computer
for future use.
All computers have a hard disk drive to
store programmes and data.

11. Storage Devices
Hard Disk
 Removable Disks
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Floppy Drive
CD-ROM, R, RW
DVD-ROM, R, RW
Pen Drive, Thumb Drive, Zip Drive
External Hard Disk

12. TEST YOUR
UNDERSTANDING!

13. Visualize these components
and draw them!
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Keyboard
Mouse
Monitor
Speaker
Webcam
Printer
CPU
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Mother board
Slot Card
RAM
USB port
PS2 port
Parallel port
Serial port
Floppy Drive