Computer is a device that accepts input, processes data, stores data, and produces output, all according to a series of stored instructions. There are two types of computers:Digital and Analogue

1. BYHaideRAliMaliK

2.  A device that accepts input, processes data, stores
data, and produces output, all according to a series
of stored instructions.

3. Types of Computers
Digital
computers
Analog
computers
Digital
Computers
Micro
Computers
Desktop
Computes
Laptop
Computers
Tablet
Computers
Palmtop
Computers
PC
Mainframe
computers
Super
Computers
Mini
Computers

4. Analog Digital
Analog computer works with
continuous values.
Digital computers works with discrete
value (0,1).
It has very limited memory. It can store large amount of data.
It is difficult to use It is easy to use.
Analog computers is used in
engineering and scientific applications.
Digital computer is widely used in
almost all fields of life.
It is used for calculations and
measurement of physical quantities
such as weight, temperature and
speed.
It is used to calculate mathematical and
logical operations.
Its accuracy is high. Its accuracy is comparatively low.
Examples: Thermometer, analog clock,
Car speedometer, radio/tv signal etc.
Examples: digital watches, mini
computers, microcomputers, and super

5. Microcomputers is the smallest, least expensive of all the
computers. Micro computers have smallest memory and less
power, are physically smaller and permit fewer peripherals to
be attached.
Micro
computers

6. Classification of
Microcomputers

7. DESTKTOP
COMPUTERS
 Desktop computers are the most common
type of PC
 A microcomputer that fits on a desk and
runs on power from an electrical wall outlet.

8.  Notebook Computer – also known as laptop
computers are portable, lightweight and are easy to
carry around.
 A portable, compact computer that can run on an
electrical wall outlet or a battery unit.
Notebook
Coputer

9. HANDHELD
COMPUTER
 They are the smallest computers that are designed
to fit into one hand or palm that is why they are
also called palm-top computers. These computers
may combine pen input, personal organizer tools and
communication capabilities such as telephone and
internet applications.
 Personal digital assistants or PDAs are the most
common palm-top or hand held computers available
today

10. Mainframe
Computers
• Mainframes are used by banks and many
business to update inventory etc.
• Mainframe computers can support
hundreds or thousands of users, handling
massive amounts of input, output, and
storage.
• Mainframes are also used as e-commerce
servers, handling transactions over the
Internet.

11.  Minicomputers are much smaller than mainframe
computers and they are also much less expensive.
 They possess most of the features found on
mainframe computers, but on a more limited scale.
 They can still have many terminals, but not as many
as the mainframes.
 Minicomputers may be used as network servers and
Internet servers.
Mini
Computers

12. • Supercomputers are the most
powerful computers.
• Supercomputers are widely used in
scientific applications such as
aerodynamic design simulation,
processing of geological data.
• They are used for problems
requiring complex calculations.
Super
computers