After going through this lesson you would be able to:  familiarise yourself with characteristics of computers  identify the basic components of a computer  explain the importance of various units of a computer  differentiate between system software and application software  explain the importance of operating system

3. A computer is a programmable
machine designed to perform
arithmetic and logical operations
automatically and sequentially on
the input given by the user and
gives the desired output after
processing.
INTRODUCTION

4. Computer components are divided into two
major categories namely hardware and
software.
Hardware is the machine itself and its
connected devices such as monitor,
keyboard, mouse etc. Software are the set
of programs that make use of hardware for
performing various functions.
INTRODUCTION

5. DEFINITION OF COMPUTER
BASIC PARTS OF A COMPUTER
COMPUTER PERIPHERALS
COMPUTER DEVICES
ELEMENTS OF A COMPUTER SYSTEM
COMPUTER SOFTWARE
What to learn ….

6. An electronic device that stores
and manipulates information. It
is maybe in the form of text,
graphics, video, or sounds.
Computer Definition

7. BASIC PARTS OF A COMPUTER
MONITOR
SYSTEM UNIT
KEYBOARD

8. BASIC PARTS OF A COMPUTER
MONITOR
The monitor allows you to see
what you and your computer are
doing together. It looks like a TV
screen.

9. BASIC PARTS OF A COMPUTER
SYSTEM UNIT
It is the brain and heart of computer.
The system unit is the enclosure for
all the other main interior
components of a computer. It is also
called the computer case, computer
chassis, or computer tower.

10. BASIC PARTS OF A COMPUTER
It helps you talk with the computer
what to do by typing the letters or
numbers on the keyboard.
KEYBOARD

11. COMPUTER PERIPHERALS
Computer peripherals are other parts
connected to the computer.

12. COMPUTER PERIPHERALS
MOUSE SCANNER CAMERA SPEAKER
MICROPHONE JOYSTICK PRINTER HEADPHONE

13. COMPUTER PERIPHERALS
A mouse is a handheld pointing
device used to position a cursor
on a computer screen.
This allows the user to select
items stored on a computer.

14. COMPUTER PERIPHERALS
The scanner copies a picture or
document into the computer.

15. COMPUTER PERIPHERALS
The microphone allows you to
record your voice and other
sounds.

16. COMPUTER PERIPHERALS
The joystick is used in playing
computer games. It works like
the mouse and the arrow keys
found in the keyboard.

17. COMPUTER PERIPHERALS
The digital camera or digicam
captures pictures into a
computer. These pictures or
images can be saved in the
computer.

18. COMPUTER PERIPHERALS
The printer takes what you
see on the computer screen
and prints it on paper.
The printed copy is called
hard copy. It can be in color
or in black.

19. COMPUTER PERIPHERALS
The speaker produce sounds
coming from the computer.
They add excitement to
playing computer games.
They also allow you to hear
your favorite music.

20. COMPUTER PERIPHERALS
The headphone is a handy
speaker placed directly over
the ears. It allows the user to
listen to the sound coming
from the computer.

21. COMPUTER DEVICES
 Input devices
 Processing devices
 Output devices
 Storage devices

22. COMPUTER DEVICES
Input devices
They are parts of a computer that
receive instructions from the
user. They also give commands
to the computer.

23. COMPUTER DEVICES
Examples Input devices
MOUSE
SCANNER CAMERA
MICROPHONE
JOYSTICK
KEYBOARD

24. COMPUTER DEVICES
Processing devices
This device is a part of a
computer that processes
the instructions received
from the input devices.

25. COMPUTER DEVICES
Output devices
They are parts of a computer that
produces the results of the
instructions processes by the
Central Processing Unit.

26. COMPUTER DEVICES
Examples of Output devices
SPEAKERPRINTER
HEADPHONE
MONITOR

27. COMPUTER DEVICES
Storage devices
They are devices that store data
or information. Some storage
devices are permanently installed
in the computer, others are
portable and may be transported.

28. COMPUTER DEVICES
Examples of Storage devices
HARD DISK
DRIVE COMPACT
DISC
FLOPPY
DISC
PEN
DRIVE

29. ELEMENTS OF A COMPUTER SYSTEM
 HARDWARE
 SOFTWARE
 FIRMWARE
 PEOPLEWARE

30. ELEMENTS OF A COMPUTER SYSTEM
HARDWARE
Are the physical parts of a
computer. It includes the input
devices, the processor, and all the
output devices and peripherals.

31. ELEMENTS OF A COMPUTER SYSTEM
SOFTWARE
Is a collection of code and programs
installed onto your computer's hard
drive.

32. ELEMENTS OF A COMPUTER SYSTEM
FIRMWARE
This is the soul of the computer.
Without it, the computer is dead.
The moment you turn on the
computer, these programs are
executed.

33. ELEMENTS OF A COMPUTER SYSTEM
FIRMWARE

34. ELEMENTS OF A COMPUTER SYSTEM
PEOPLEWARE
To complete a whole computer
system, it needs one element to
operate a computer.

35. Is the set of programs that makes the
hardware perform a set of tasks in
particular order. Hardware and software
are complimentary to each other. Both
have to work together to produce
meaningful results. Computer software is
classified into two broad categories;
system software and application
software.
COMPUTER SOFTWARE

36. 1. Mac Operating System
2. Windows Operating System
3. Android Operating System
4. Linux Operating System
COMPUTER SOFTWARE
System Software

37. Types of application software are:
1. Word processing software
2. Database software
3. Spread sheet software
4. Presentation software
5. Multimedia software
COMPUTER SOFTWARE
Application software

38. DEFINITION OF COMPUTER
BASIC PARTS OF A COMPUTER
COMPUTER PERIPHERALS
COMPUTER DEVICES
ELEMENTS OF A COMPUTER SYSTEM
COMPUTER SOFTWARE
We learned….