A computer system consists of various interconnected components that work together, including hardware devices and software programs. It allows users to input data using devices like a keyboard and mouse, processes the data, and outputs the results through devices like a monitor. The main internal hardware components are the system unit, monitor, keyboard, and mouse. External or peripheral devices include input devices to send data to the computer and output devices that provide output from the computer to the user. A computer system runs using both system software like the operating system, and application software that performs specific tasks for users.

1. The different components of
a computer system

2. What is a computer?
A computer is an electronic device that manipulates information, or data.
The system Unit
Keyboard
Mouse
It is called a Computer System:
As it is not a single machine but a collection of many devices which work together to perform a task.
Monitor

4. Parts Of The Computer System

5. Users
Peoples are the computer operators,
also known as users.

6. What is hardware?
Computer hardware refers to the physical parts
or components of a computer
All of which are physical objects that can be touched

8. What is Peripheral?
(External parts of computer)
A peripheral is the general term used to describe devices which are externally
connected to a computer.
Input Devices:
used to interact with or send data to the computer
e.g. mouse, keyboards, etc…
Output Devices:
which provides output to the user from the computer
e.g. monitors, printers, etc…
Storage Devices:
which stores data processed by the computer
e.g. Hard drives, flash drives, etc…
Network devices:
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9. What you put into a computer (input) controls what you get out of it (output).
The equipment which you use to put information (called data) into a computer is called input devices.
The equipment we use to get out of the computer is called output devices.
Activity
A. Input and Output devices
1.Here are some input devices. Write the missing letters.
(1) k __ __ __ __ __ __ d (2) j __ __ s __ __ __ k
(3) __ __ u __ e (4) s __ __ n n __ r
2. Here are some output devices. Write the missing letters.
(1) l a s __ __ P __ __ n __ __ r (2) __ __ n __ t __ __
(3) S p __ __ k __ __ __ (4) p __ __ t __ e __

10. 4. Sort these devices into the correct column.
Scanner, Printer, Keyboard, Mouse, Monitor, Joystick, Speaker, Projector, Dongles and modems
Digital camera, Microphone, Barcode reader, Webcam, Game controller, USB flash drives, Plotter,
touch screen
Input Devices Output Devices I/O Devices Storage Devices Network Devices

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12. Storage
 Byte – Stores the equivalent of one character.
 Kilobyte (1 KB) – 1,024 bytes.
 Megabyte (1 MB) – 1,048,576 bytes.
 Gigabyte (1 GB) – 1,073,741,824 bytes.
 Terabyte (1 TB) – 1,099,511,624,776 bytes.
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13. B. Storage devices
Draw lines to match the different secondary storage
devices to the read/write equipment.
Activity
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14. What is software?
Software is a Set of Instructions that makes the computer perform
tasks. In other words we can say that, software tells the computer what to do.
Will learn more about software on the 3rd day……..

15. 1. What is a computer?
2. How the data stored or how the computer sees the data?
3. What is hardware?
4. Give some Examples for internal components of a computer?
5. Give some examples for external parts of computer?
6. What is software?
7. What are the main types of PC?
8. Give some examples for the companies that makes PC?
9. What is a server?
Quiz Time

16. What is data?
DATA is a collection of independent and Unorganized
Facts.

17. Types of Data
Text
Numbers
Graphics
Audio
Video
Images

18. What is information?
Information is the processed and Organized data presented in a
Meaningful form.

19. Information Processing Cycle
PROCESSING SYSTEM
DATA INFORMATION
A computer Primary job is to process these tiny pieces of Data
in various ways, Converting them into useful Information

20. Raw Data
Context
Information
Process
51,77,58,82,64,70
Test scores achieved by students
Average test score is 67%.
This shows that the first
student’s mark is way below
average
Process
Example:

21. Data Information
Meaning
Data is raw, unorganized facts that need to be
processed. Data can be something simple and
seemingly random and useless until it is organized.
When data is processed, organized,
structured or presented in a given context so
as to make it useful, it is called Information.
Example Each student's test score is one piece of data
The class' average score or the school's
average score is the information that can be
concluded from the given data.

22. Functions of an Information
Processing System
1. It accepts and gather data (INPUT)
2. It processes data to become information (PROCESSING)
3. It stores data and information (STORE)
4. It presents information (OUTPUT)

23. Any information or data that's Entered or sent to the computer to be
Processed is considered Input.

24. What is output?
Any information that has been processed and comes from a
Computer or computer device is considered output.

25. Why we use computer?

26. Think about the Activities you perform or want to perform
using a computer
Challenge!

27. Don’t you use computer to
Type documents?

28. Don’t you Send Email & Browse the Web?

30. Is it a Computer that controls Stoplights
so you can drive to work?

31. How did the Cashier scan and Calculate your
Grocery items?

32. Is the Weather map on Television Computer-generated?

34. Don’t you use computer to communicate?

35. Entertainment

36. What makes a Computer Powerful?

37. • Desktop Computer
• Laptop
• Netbook
• Tablet
• PDA (Personal Digital Assistant)
• SmartPhone
Types Of Computer Equipment

38. A computer designed for use by one person at a time.

39. Desktop Computer
Lap top Computer
What are the different types of PCs?

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Designed so All of the Components fit on or under a Desk or Table

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What is Laptop computer?
A computer that is portable small enough to fit on your
lap and suitable for use while travelling.

42. What are the Main types of software?
System software
Application software

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What is system software?
Operating System (OS)
is a set of programs
that coordinates all
activities among
computer hardware
devices and allows
users to run
application software
Utility Programs allow the user to
perform maintenance-type tasks
usually related to managing a
computer, its devices or its programs
Programs that control the operations of the computer and its devices

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Computer Software
What is application software?
Presentation
Graphics
Spreadsheet
Database
Word
Processing
Programs that perform specific tasks for users