1. 1.6 Inside the system unit [Hardware]
Class: ________________
Name: ________________

2. 1.6 Computer System
System unit 4. 3. 5. 6 2. 7. 1. 8.
10. 9.

3. 1.6 Computer System

4. 1.6 Inside the system unit

5. 1.6 Inside the system unit 1. 5. 2. 6. 7. 3. 8. 4. 9.

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 1. 2. 3. 4.

7. 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. 1.7 Function of Parts of a Computer System (Hardware – system unit)
The casing of the system unit (Cont’d)
Comes in a variety of design
system unit

9. 1.7 Function of Parts of a Computer System (Hardware – system unit)
The casing of the system unit (Cont’d)
Comes in a variety of design
system unit

10. 1.7 Function of Parts of a Computer System (Hardware – motherboard)
All processing takes place in the system unit.
The system unit contains
the motherboard

11. 1.7 Function of Parts of a Computer System (Hardware - motherboard)
the motherboard
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.

12. 1.7 Function of Parts of a Computer System The BRAIN

13. 1.7 Function of Parts of a Computer System (Hardware - CPU)
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

14. 1.7 Function of Parts of a Computer System The Memory / Storage Devices

15. For a computer to work, it needs to remember
1.7 Function of Parts of a Computer System (Hardware – Memory/ Storage)
For a computer to work, it needs to remember
Instructions for the computer’s hardware (programs)
User’s information/ data

16. 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. 1.7 Function of Parts of a Computer System (Hardware – Memory/ Storage)

18. 1.7 Function of Parts of a Computer System (Hardware – Memory/ Storage)
Primary memory
Stores data currently or frequently used
Primary Memory

19. 1.7 Function of Parts of a Computer System (Hardware – Memory/ Storage)
Primary Memory

20. 1.7 Function of Parts of a Computer System (Hardware – Memory/ Storage)
Secondary storage media
Stores data and programs permanently
Able to store large amount of data

21. 1.7 Function of Parts of a Computer System (Hardware – Memory/ Storage)

22. 1.7 Function of Parts of a Computer System Input Devices

23. 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

24. 1.7 Function of Parts of a Computer System – Input Devices
The keyboard and mouse
Important tools because they are used to control the computer
Designs have improved greatly
Input Devices

25. 1.7 Function of Parts of a Computer System – Input Devices
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

26. 1.7 Function of Parts of a Computer System – Input Devices
Used to input data to the computer by clicking
It is a pointing device that directs a pointer on the monitor.

27. 1.7 Function of Parts of a Computer System – Input Devices
Input sound/ audio into the computer system
microphone

28. 1.7 Function of Parts of a Computer System – Input Devices
Reads or scans information into the computer.
The information can be text or graphics.
It is usually to scan photographs

29. 1.7 Function of Parts of a Computer System – Input Devices
The unit that plugs into a game console to control the game play.
Commonly used in computer games.
Game console controller.

30. 1.7 Function of Parts of a Computer System – Input Devices
Barcode reader:- reads information on a barcode. Commonly used in libraries and supermarkets
Barcode reader

31. 1.7 Function of Parts of a Computer System – Input Devices
Reads marks made on specially printed forms and inputs into computer

32. 1.7 Function of Parts of a Computer System – Input Devices

33. 1.7 Function of Parts of a Computer System (Output Devices)

34. 1.7 Function of Parts of a Computer System – Output Devices
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

35. 1.7 Function of Parts of a Computer System – Output Devices
The display unit
Displays information onto a screen
Main way computer communicates with users

36. 1.7 Function of Parts of a Computer System – Output Devices
The display unit
Many types invented over the years

37. 1.7 Function of Parts of a Computer System – Output Devices
The display unit
Many types invented over the years

38. 1.7 Function of Parts of a Computer System – Output Devices
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

39. 1.7 Function of Parts of a Computer System – Output Devices
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

40. 1.7 Function of Parts of a Computer System – Output Devices
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

41. 1.7 Function of Parts of a Computer System – Output Devices

42. 1.7 Function of Parts of a Computer System – Output Devices
Printers (Cont’d)

43. 1.7 Function of Parts of a Computer System – Output Devices

44. 1.7 Function of Parts of a Computer System (Other Devices)

45. 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. 1.7 Function of Parts of a Computer System – Input Devices – 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

47. 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. Wired and wireless computer parts
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. Wired and wireless computer parts
1.9 Network
Wired and wireless computer parts
Wireless computer parts
No physical connection
Example: wireless router, cordless mouse

50. 1.10 Q&A Keyboard, mouse, flat-bed scanner, microphone
Monitor, speaker, laser printer, inkjet printer (Other answers: projector)
CD-ROM drive, hard disk (Other answers: thumb drive)

51. 1.10 Q&A
Inkjet
Laser
Dot matrix

52. 1.10 Q&A 1. 2. 3. 4. 5. 6. 7 8. 9.

53. 1.10 Q&A

54. End of Part 7 To return to the lesson
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