There are four main types of computers according to size and speed: super computers, mainframe computers, mini computers, and micro computers. Super computers are the largest, fastest, and most expensive, able to perform over 1 trillion calculations per second. Mainframe computers are less powerful than super computers but more so than other types, used mainly for networking by banks, hospitals, and universities. Mini computers are also known as midsize or low-end mainframes, designed for industrial and small business use. Micro computers are the smallest and least expensive, including desktops, laptops, and PDAs.

1. Introduction to IT
Imran yar
BSC,MCS
Lecturer of CS

2. Today’s Lecture
Types of Computer
• Super Computers
• Mainframe Computers
• Mini Computer
• Micro Computers

3. There are Four Types of Computer according
to Size and Speed
1. Super Computer.
2. Mainframe Computer.
3. Mini Computer.
4. Micro Computer.

4. What is Super Computer?
• The super computers are the largest, fastest and most
expensive computers in the world.
• Supercomputers are the most powerful and physically
the largest by size. These are systems designed to
process huge amounts of data and the fastest

5. What is Super Computer?
• supercomputers can perform over one trillion
calculations in a second
• 1000 individual PCs can be attached to a super
computer.

6. Continue …Super Computer?
• They are designed to process complex scientific
applications.
• These computers are 50,000 times faster then the
micro computer.
• They are five times faster then the large mainframe
computers.

7. Continue …Super Computer?
• Super Computers
• The most powerful computers made.
• Handle large and complex calculations.
• Process trillions of operations per second.
• Found in research organizations.

8. Continue …Super Computer?

9. What is Mainframe Computer?
• They are less expensive, less powerful and slower
then the super computer. Still they are faster then the
other types of computer.
• They can process 10 million numbers per second.
• The IBM introduced the families of mainframes
(small, medium, large). 1000 workstation can be
attached to a normal mainframe.

10. What is Mainframe Computer?
• Some of the functions performed by a mainframe
include:
• flight scheduling, reservations and ticketing for an airline;
government agencies such as the Internal Revenue Service
and Electoral Commission use mainframes to track
information about large populations, vote computations,
individual tax records, payroll, etc.

11. Continue…Mainframe Computer?
• These computers are mainly used for the networking
purposes. The application areas of the mainframe
computers are banks, hospitals, universities etc.
• Mainframe computers have special operating system
that can handle parallel user processing, transactions
and time sharing. These computers run best run on
Linux operating system.

12. Continue…Mainframe Computer?

13. What is Mini Computer?
• Mini computers are also known as midsize or low-end
mainframe computers.
• They are designed for the computerization of data for
research, industrial process and small business
application.
• The size of the mini computer prevents it from being
portable but it can be moved more easily than a
mainframe. Time sharing are available on the mini
computers.

14. Continue Mini Computer?

15. What is Micro Computer?
• A micro computer is the smallest, less expensive of all
computers.
• The word micro refers mainly to the physical size and
circuitry. It a small computer and originally it had
rather limited capabilities as compared to the large
mainframe computers.

16. What is Micro Computer?
• Now the microcomputer is more powerful than the
early mainframe.
• Examples of the micro computers are IBM, Apple,
Compaq, etc.
• the smallest single-user systems
• Microcomputers or personal computers

17. Types of Micro Computer?
Micro Computer
Desktop
Laptop/
Notebook
PDA (Personal
Digital Assistant)

18. Continue Micro Computer?

19. Continue Micro Computer?

20. Continue Micro Computer?