CSS 9

1. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.6 Inside the system unit
[Hardware]
Class: ________________
Name: ________________

2. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.
2.
3. 5.
6
7.
8.
9.
10.
System unit
4.
1.6 Computer System

3. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.6 Computer System

4. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.6 Inside the system unit

5. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.
2.
3.
4.
5.
6.
7.
8.
9.
1.6 Inside the system unit

6. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System
(Hardware)
• A computer is made up of different parts
• Each part performs different function or operation
2.
3.
4.
Process data
1.

7. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System
(Hardware)
• A computer is made up of different parts
• Each part performs different function or operation
Process data

8. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• The casing of the system unit (Cont’d)
• Comes in a variety of design
1.7 Function of Parts of a Computer System
(Hardware – system unit)
system unit

9. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• The casing of the system unit (Cont’d)
• Comes in a variety of design
1.7 Function of Parts of a Computer System
(Hardware – system unit)
system unit

10. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• All processing takes place in
the system unit.
• The system unit contains
• the motherboard
1.7 Function of Parts of a Computer System
(Hardware – motherboard)

11. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
A motherboard is the central
printed circuit board (PCB)
that holds many of the
crucial components of the
system, such as the CPU,
memory, graphics adapter
and sound card while
providing connectors for
other peripherals such as
printers, scanners, hard
disks, microphones, web
cams, and digital cameras.
1.7 Function of Parts of a Computer System
(Hardware - motherboard)
the motherboard

12. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a
Computer System
The BRAIN

13. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• the processor, Central Processing
Unit (CPU), also called processor
– It is the brain of the computer
– It processes data and
instructions
– It takes instructions and
executes them
– It coordinates and controls flow
of data between different parts
of the computer
1.7 Function of Parts of a Computer System
(Hardware - CPU)

14. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a
Computer System
The Memory /
Storage Devices

15. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
•For a computer to work, it needs to
remember
– Instructions for the computer’s
hardware (programs)
– User’s information/ data
1.7 Function of Parts of a Computer System
(Hardware – Memory/ Storage)

16. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System
(Hardware – Memory/ Storage)
System Unit contains the Primary
memory and some secondary
memory:
• Primary storage / memory
• Read Only Memory (“ROM”)
• Stores data permanently
• Random Access Memory (“RAM”)
• Stores data temporarily
• Secondary Storage/ Storage
• Hard disk

17. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System
(Hardware – Memory/ Storage)

18. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
– Primary memory
• Stores data currently or frequently used
1.7 Function of Parts of a Computer System
(Hardware – Memory/ Storage)
Primary Memory

19. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System
(Hardware – Memory/ Storage)
Primary Memory

20. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
– Secondary storage media
• Stores data and programs permanently
• Able to store large amount of data
1.7 Function of Parts of a Computer System
(Hardware – Memory/ Storage)

21. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System
(Hardware – Memory/ Storage)

22. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a
Computer System
Input Devices

23. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System –
Input Devices
• All these are input
devices
• Scanner
• Scans information on
hard copy into the
computer
• Microphone
• Captures sound into
the computer
Input Devices

24. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• The keyboard and mouse
• Important tools because they are used to
control the computer
• Designs have improved greatly
1.7 Function of Parts of a Computer System –
Input Devices
Input Devices

25. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• Used to input data to the computer by typing.
• It is used to type words or numbers into the computer
system.
Inputs data
corresponding to the
key being pressed
1.7 Function of Parts of a Computer System –
Input Devices

26. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• Used to input data to the computer by clicking
• It is a pointing device that directs a pointer on the
monitor.
1.7 Function of Parts of a Computer System –
Input Devices

27. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
•Input sound/ audio into the computer system
microphone
1.7 Function of Parts of a Computer System –
Input Devices

28. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
•Reads or scans information into the computer.
•The information can be text or graphics.
•It is usually to scan photographs
1.7 Function of Parts of a Computer System –
Input Devices

29. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• The unit that plugs into a game console to control the
game play.
• Commonly used in computer games.
1.7 Function of Parts of a Computer System –
Input Devices
Game console controller.

30. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• Barcode reader:- reads information on a barcode.
Commonly used in libraries and supermarkets
1.7 Function of Parts of a Computer System –
Input Devices
Barcode reader

31. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
•Reads marks made on specially printed forms and
inputs into computer
1.7 Function of Parts of a Computer System –
Input Devices

32. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System –
Input Devices

33. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a
Computer System
(Output Devices)

34. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• All these are output devices
• Monitor
• Like a television screen
• Displays information from the data
inputted
• Printers
• Display information on paper
• Hard copy
• Some prints in colour; others print in
black only
• Speakers
• Produces sound and music generated
by the computer
1.7 Function of Parts of a Computer System –
Output Devices

35. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• The display unit
• Displays information onto a screen
• Main way computer communicates with users
1.7 Function of Parts of a Computer System –
Output Devices

36. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• The display unit
• Many types invented over the years
1.7 Function of Parts of a Computer System –
Output Devices

37. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System –
Output Devices
• The display unit
• Many types invented over the years

38. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• Printers: Sends information produced by the
computer system in a printed form.
• Prints text or illustrations onto paper
• There are different types of printers.
• Main types: • Thermal printer
• Print created by pushing
heated pins against heat
sensitive paper
• Cheap and fast
• Used widely in supermarket
checkouts and ATM
1.7 Function of Parts of a Computer System –
Output Devices

39. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• Printers (Cont’d)
• Inkjet printer
• Print created by spraying
dots of ink onto paper
• High quality text and
graphics
• Slow
• Cost of printer low but
cost of ink is high
1.7 Function of Parts of a Computer System –
Output Devices

40. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• Printers (Cont’d)
• Laser printer
• Print created by
• Applying ink powder (toner) to
drum
• Toner on drum is then heated
and applied to paper
• Very high quality text and graphics
• Fast
• Expensive
• Toner is sold in cartridges
• Expensive but can print more
pages than an inkjet printer
1.7 Function of Parts of a Computer System –
Output Devices

41. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System –
Output Devices

42. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• Printers (Cont’d)
1.7 Function of Parts of a Computer System –
Output Devices

43. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System –
Output Devices

44. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a
Computer System
(Other Devices)

45. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System –
Input/ Output Devices
Touch screen:- input information by touching the
screen. Commonly used in PDA, hand phones, bus
terminals, tourist kiosks, and shopping centers.
PDA
Touch Screen
GPS

46. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
• Data logger
• An electronic instrument that has a microprocessor, data
storage and a sensor
• Used to record measurements such as temperature
• A computer is used to display the measurements
1.7 Function of Parts of a Computer System –
Input Devices – Data logger

47. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.7 Function of Parts of a Computer System –
Input/ Output Devices
• Printers (Cont’d)
• Multifunctional printers
• Multiple functions
• Printing, scanning,
copying and faxing
• Convenient
• Disadvantages
• Over-using one function
may interfere with other
functions
• More likely to break down
due to the many functions

48. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.8 Cables
• Wired and wireless computer parts
• Computer parts classified into wired and wireless ones
• Wired computer parts
• Physically connected by wires or cables
• Connected to attachments called ports

49. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.9 Network
• Wired and wireless computer parts
• Wireless computer parts
• No physical connection
• Example: wireless router,
cordless mouse

50. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1. Keyboard, mouse, flat-bed scanner, microphone
2. Monitor, speaker, laser printer, inkjet printer (Other
answers: projector)
3. CD-ROM drive, hard disk (Other answers: thumb drive)
1.10 Q&A

51. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.10 Q&A
1. Inkjet
2. Laser
3. Dot matrix
4. Laser

52. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.
2.
3.
4.
5.
6.
7
8.
9.
1.10 Q&A

53. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
1.10 Q&A

54. Function of the Computer Parts
C O B : C O M P U T E R B A S I C S
COB 1 Part 6
End of Part 7
To return to the lesson
http://cpa-
yyss.wikispaces.com/Computer+System
Or use the Back button.