The document discusses computer input-output devices and types of computers. It defines a computer system as a programmable machine that receives input, stores and manipulates data, and provides output. The major computer parts are described as input devices like keyboards, mice, and scanners, and output devices like monitors, projectors, printers, and speakers. The central processing unit or CPU controls all internal and external devices and performs calculations. Computer types include super computers, mainframe computers, mini computers, and micro computers like desktop and laptop computers. The document provides examples of computer applications in fields like publishing, medicine, banking, transportation, education, news, robotics, and weather analysis.

1. Computer
Input-Output devices
By
Khan Alisha
Javeed

2. Content
What is computer system?
Major parts of computer
Types of computer
Application of computer

3. Computer system
Computer system – it is a
programmable machine that receives
input , stores and manipulate data and
provide output in a useful format.

4. Parts of Computer
 Input devices
 Keyboard
 Mouse
 Scanner
 Web-Camera
 Joysticks
 Output devices
 Monitor
 Projector
 Printer
 Speaker
 Headphones

5. Mouse

6. Web-Camera

7. Scanner

8. Monitor

9. Projector

10. Printer

11. Central Processing Unit
The main unit inside the computer is
the CPU.This unit is responsible for
all events inside the computer . It
controls all internal and external
devices , performs arithmetic and
logic operation .
The CPU is the device that interprets
and executes instruction.

12. Types of computer
o Super Computer
o Mainframe Computer
o Mini Computer
o Micro Computer
• Desktop Computer
• Laptop Computer

13. Mainframe Computer
Mainframe Computer is a very large
and expensive computer capable of
supporting hundreds , or even
thousands , of users simultaneously .

14. Super Computer
The fastest type of computer ; super
computers are very expensive and are
employed for specialized applications
that require immense amounts of
mathematical calculations.

15. Mini Computer
Mini computer is a midsized
computer . In size and Power ,
minicomputers lie between
workstations and mainframes.
In general minicomputer is a
multiprocessing system capable of
supporting from 4 to about 200 users
simultaneously.

16. Desktop Computer
Desktop computer :is a personal or
micro-mini computer sufficient to fit
on a desk.

17. Laptop Computer
Laptop computer is a portable
computer complete with an integrated
screen and keyboard . It is generally
smaller in size than a desktop
computer and larger than a notebook
computer.

18. Palmtop Computer
Palmtop computer is a hand-sized
computer , palmtops have no
keyboard but the screen serves both
as an input and output devices.

19. Application Of Computer
 Desktop publishing –with desktop publishing , you can create page layouts for entire books on your
personal computer.
 Computers in medicine - you can diagnose diseases. you can learn the cure.
 Banks –All financial transactions are done by computer software. They provide security ,speed and
convenience.
 Travel –One can book air tickets or railway ticket and make hotel reservations online .

20.  Examination – You can give online exams and get instant results. You can check your examination results
online .
 News – There are many websites through which you can read the latest or old news.
 Robotics – Robots are controlled by software .
 Airplanes – Pilots train on software , which simulates flying.
 Sports – Software is used for making umpiring decisions .
 Weather analysis – Supercomputers are used to analyze and predict weather.
 E-Learning – Instead of a book it is easier to learn from an E-learning software .

21. Thank
You…..