1. Presented by:
Bikrant roy

2. WhatistheClassificationof Computer
Computer are available in different
shapes and weights, due to these
different shapes and sizes they
perform different sorts of jobs form
one another.
Computers are classify according to:
Purpose
Type of Data Handled
Functionality
Size

3.  General purpose
 Specific purpose
According to purpose , computers are
classified into

4.  Computers are designed to perform different
tasks.
 They have ability to store numerous programs ,
but lack in speed and efficiency.
Generalpurpose

5.  Computers are designed to handle a specific
problem or to perform a specific task.
 A set of instructions is built into the machine.
Specific purpose

6.  Analog
 Digital
 Hybrid
Accordingtodatahandling,computersare

7.  Computers work on the principle of measuring ,
in which the measurements obtained are
translated into data
 Modern analog computers usually employ
electrical parameters , such as voltages ,
resistances or currents , to represent the
quantities being manipulated
 Such computers do not deal directly with the
numbers
 They measure continuous physical magnitudes
Analog

8.  Computer are those that operate with
information , numerical or otherwise ,
represented in a digital form
 Such computers process data into a digital
value(in 0s and 1s)
 They give the results with more accuracy and at
faster rate
Digital

9.  Computers incorporate the measuring feature of
an analog computer and counting feature of a
digital computer
 For computational purposes , these computers
use analog components and for storage , digital
memories are used
Hybrid

10.  Digital computer
 Analog computer
 Hybrid computer(analog + digital)
Accordingtofunctionality,computersareclassified
as

11.  Digital computer are specialized in counting.
 Digital computer counts and answer the questions by the
method of “HOW Many”.
 The input data is represented by a number.
 These are used for the logical and arithmetic operations.
 All commonly used computers are DIGITAL
 Performs calculations and logical
operations with quantities
represented as digits , usually In
the binary number system.

12. ANALOG COMPUTER:
 Analog computer were commonly used for scientific &
engineering problems, particularly in chemical industry,
electric power plants, and petroleum refineries.
 These type of computers are rarely use in current world.
For Example:
Electric current meter, Fuel pump station meters etc.
 Uses continuous physical
phenomena such as electrical ,
mechanical , or hydraulic quantities
to model the problem being solved

13.  The combination of features of analog and digital
computer is called Hybrid computer.
 Used in various areas of engineering,
space vehicle simulation and training of astronauts,
passenger flight radar system, also used to control robots
 A combination of computers those are capable of
inputting and outputting in both digital and analog
signals
 A hybrid computer system setup offers a cost
effective method of performing complex simulations

14. ClassificationofComputerbySize:
There are four main
classifications of
computers by size: Micro-Computers
Super Computer
Mainframe Computers

15. Micro-computer:
The term micro-computer is generally synonymous with
personal computer (PC), or a computer that depends on a
microprocessor.
Micro-computers are designed to be used by individuals.
There are two sub categories in it. One is PC which is less in price &
reliability,
other is Workstation which is expensive in price & reliability comparing with
PC
Application : -
Personal computer, Multi user system, offices.

16.  Desktop computer : a personal or micro-mini
computer sufficient to fit on a desk.
 Laptop computer : 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.
 Palmtop computer : a hand-sized computer.
Palmtops have no keyboard but the screen
serves both as an input and output device.
Microcomputer

17. MINI-COMPUTER:
A minicomputer is a type of computer that possesses most
of the features and capabilities of a large computer
but is smaller in physical size.
A minicomputer may also be called a mid-range computer.
These are also small general purpose system.
They are generally more powerful and most useful as
compared to micro computer.

18.  Mid-sized computer
 In size and power , minicomputers lie
between workstations and mainframes.
 A minicomputer is a multiprocessing system
capable of supporting from 4 to about 200
users simultaneously.

19.  Mainframe computers are those computers that offer faster
processing and grater storage area.
 It is also known as Father computer.
 Very large and
expensive computer
capable of supporting
hundreds , or even
thousands , of users
simultaneously.
 More powerful than
supercomputers because
they support more
simultaneous programs

20. • Designed for Multiple user interfaces.
• Different people can operate these
computers at the same time.
• Use for Non Stop reliable operations.
• Memory in GB’s, storage in TB’s
• Use in Large Business, Airlines, Banks, E-
Commerce Sites,
Military, Industrial organizations

21. Super Computer:
Super computer are those
computer which are designed
for scientific job like whether
forecasting and artificial
intelligence etc. They are
fastest and expensive. A super
computer contains a number of
CPU which operate in parallel
to make it faster.

22.  Very expensive
 Employed for specialized applications
that require immense amounts of
mathematical calculations
 Uses-
 animated graphics
 fluid dynamic calculations
 nuclear energy research
 petroleum exploration