1. Computer Hardware Information Technology Week 5 and 6

2. Essential Question(s)
Objectives
Discuss how a computer uses binary codes to represent data in electronic form
Describe input and output devices
Describe each of the major system unit components
Distinguish between primary and secondary storage
Describe the different types of memory
Essential Question(s)
Discuss expansion slots and boards
How does a computer work?
Discuss the four standard ports
Why are some computers more powerful than others?
Define input and output
How do you get information out?
How do you recall information?

3. Class …..
Take out your notes and be prepared to write down all the questions and answers presented in this Power Point Notes are worth 50 points and will be delivered over several days.

4. What Is a Computer?
How is a computer defined?
A programmable, usually electronic device, that can store, retrieve and process data
Some of the first computers were mechanical, then electro mechanical

5. SOME OF THE FIRST COMPUTERS

6. MY FIRST COMPUTERS
Referred in kilobytes now in speed

7. The Components of a Computer
What is an input device?
Hardware used
to enter data
and instructions

8. The Components of a Computer
What is an output device?
Hardware that
conveys information to a user

9. The Components of a Computer
What is the system unit?
Box-like case
containing
electronic
components
used to process
data

10. What is the magic inside the black box?
Storage Units
Memory card
Video Card
Power
Supply
CPU
Is the Mother Board
Whole Thing
Sound Card

11. What is it?
Power supply

12. An opening on a system board or mother board.
What is….
Expansion slot

13. Expansion card
What is this?

14. The Components of a Computer
What are two main components on the
motherboard?
Central Processing Unit (CPU)
Also called a processor
Carries out instructions
that tell computer what to do
Memory
Temporary holding place for data
and instructions

15. Central Processing Unit (CPU)
What is….
The part of the computer that holds data and program instructions for processing the data.
Central Processing Unit (CPU)

16. CPU stand for?
What does….
Central Processing Unit

17. The communications media for the entire system including the CPU.
What is….
motherboard

18. What is….
Contained on chips connected to the system board and is a holding area for data instructions and information.
memory

19. The Components of a Computer
What is storage?
Holds data, instructions, and information for future use
Storage media
Physical material on which data, instructions, and information are stored
Storage device
Records and retrieves items to and from a storage medium

20. The Components of a Computer
What is a hard disk?
Provides much greater storage capacity than a CD Drive
Housed inside the system unit
Enclosed disk drive containing one or more metallic discs.

21. The Components of a Computer
What is a compact disc?
Flat, round, portable plastic-metallic disc
CD-ROM
CD-RW
Capacity: 673~768 MB
DVD-ROM
DVD+RW
Capacity:4.7 ~ 17.1 GB

22. The Components of a Computer
What is miniature storage media?
Digital cameras
Portable, thin memory cards used in:
Handheld computers
cell phones

23. Identify & list from least capacity to most capacity.

24. A tiny circuit board etched onto silicon.
What is….
chip

25. MEMORY TYPES
RAM
Random Access Memory
ROM
Read Only Memory

26. Provides space for programs in use.
What is….
RAM

27. Provides instructions for starting the computer.
What is….
Provides instructions for starting the computer.
ROM

28. RAM ROM Forgets everything when the computer is turned off.
Computer Memory
RAM or ROM?
RAM or ROM?
Forgets everything when the computer is turned off.
Unable to change.
RAM
ROM

29. How often a displayed image is updated or redrawn on the monitor.
What is….
Refresh rate

30. Data sent to the computer.
What is….
input

31. Input OR Output? Keyboard Monitor Printer Camera Scanner Tablet
Speaker
Touch Pad IN
OUT

32. Accessing information from storage.
What is….
reading

33. A measurement in pixels or a monitor’s clarity.
What is….
resolution

34. The amount of data that can be stored.
What is….
capacity

35. Holds data and program instructions for processing data.
What is….
Holds data and program instructions for processing data.
Primary storage

36. Storage that loses data when the computer turns off.
What is….
volatile

37. What is….
Permanent storage used to preserve programs and data and can be retained after the computer is turned off.
Secondary storage

38. Which one has the most uses?
USB

39. The chip that contains the CPU. (The brains of the system)
What is….
microprocessor

40. What is….
The measure of a computer’s processing power. (How fast it can execute code)
Clock speed

41. Where frequently accessed information is held.
What is….
cache

42. What is….
The numbering system in which all numbers consist of only two numbers: 1 and 0
Binary system

43. A single binary digit.
What is….
bit

44. A group of EIGHT binary digits.
What is….
byte

45. What is….
Any size group of binary digits. Most common starts at 8 bits 16, 32, 64
word

46. How many bytes can it process?
A 64 bit word computer
8 bytes

47. What is shown here?
Bus lines
How Binary
Travels

48. Binary TO Decimal
DECIMAL
BINARY
ASCII
153
112 17 14 81 ?
American Standard Code for Information Interchange

49. How many bytes? Approx 1,000 KB? Approx 1 million MB? Approx 1 billion
(1,024 or 2^10)
Approx 1 million
(1,048,576 or 2^20)
Approx 1 billion
(1,073,741,824 or 2^30)
Approx 1 trillion
(1,099,511,627,776 or 2^40)
KB?
MB?
GB?
TB?

50. Decimal TO Binary
DECIMAL
BINARY
128 12 2
234
178

51. Char
Binary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Char
Binary a b c d e f g h I j k l m n o p q r s t u v w x y z
Using the ASCII to Binary table to decode the following:
Ace IT