The document discusses the basic parts and functions of a computer. It defines a computer as an electronic device that can accept data as input, process the data, and provide meaningful information as output while also storing information for future use. It describes the main internal components as the motherboard, CPU, RAM, and ROM. The motherboard is identified as the backbone that connects all other parts. The CPU is described as the brain that directs other components. RAM is listed as temporary memory while ROM is permanent memory. Examples of input devices include the keyboard, mouse, and digital camera, while output devices are described as converting information into human readable formats, with examples being the monitor and printer.

1. Online class
Class 3
Prepared by:
Jeevan Subedi

3. What is computer?
A computer is an electronic device that manipulates
information, or data. It has the ability to store, retrieve, and
process data. You may already know that you can use
a computer to type documents, send email, play games, and
browse the Web.

4. computer
A computer is an electronic device, that can accept
data (input), process the data ( Processing) and
gives us meaningful Information (output), and store
the information for future use.

5. The Parts
of a
Computer

6. The TOWER
contains
many parts of a computer.
The System Unit

7. The MOTHERBOARD
is the backbone of a
computer – all other
parts plug into it

8. The CPU
(Central Processing Unit)
is the brain of a computer
– it tells the other parts
what to do

9. The RAM
(Random Access Memory)
is the temporary memory
of a computer

10. The ROM
(Random Only Memory)
is the permanent memory
of a computer

11. The input devices of
a computer are used to input the
user data or information
into computers for output results.
The common examples are
Keyboard, Mouse, Joystick,
Trackball, Digital Camera,
Scanner, Bar code Reader, OCR,
Biometric Sensor and Microphone.

12. An output device is any piece
of computer hardware equipment
which converts information into
human readable form. It can be text,
graphics, tactile, audio, and video.
Some of the output devices are Visual
Display Units (VDU) i.e. a Monitor,
Printer graphic Output devices,
Plotters, Speakers etc.

14. The MOTHERBOARD is the of
a computer
A) Brains
B) Backbone
C) Foot

15. ROM is the memory of a computer
A) Permanent
B) Smart
C) Temporary

16. The CPU is the of a computer
A) Brains
B) Backbone
C) Foot

17. RAM is the memory of a computer
A) Permanent
B) Smart
C) Temporary

18. An example of an INPUT DEVICE is:
A) Printer
B) Monitor
C) Mouse

19. An example of an OUTPUT DEVICE is:
A) Keyboard
B) Monitor
C) Mouse