2. CLASSFICATION OF COMPUTER
Types of
Computers
On the
basis of
Purpose
On the basis
of Technology
On the basis of
size & Capacity
General
purpose
Special
Purpose
Analog
Digital
Hybrid
Super
computer
Mainframe
computer
Mini
computer
Micro
computer
3. On the basis of purpose
General purpose computer
They are used to perform a variety of tasks
They are used in solving a business problem as well as mathematical
equation with same accuracy and consistency .
They are Generally found in home and offices.
Their uses include preparation of documents ,letters ,reports, financial
analysis ,data recording and analysis etc.
4. Special Purpose computers
Special purpose computers are designed to perform only
specialized task for which they are meant.
Example weather forecasting, space research ,air traffic control
,medical diagnostic etc.
5. 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.
6. Digital Computer
They represent data, whether numbers, letters ,or symbol, in binary form and they
work with numbers in the form of separate discrete digits .
They can be used in different applications ( like commercial , administrative and
Mathematical ) since they can store different set of instructions and program .
There are Three major elements in a digital computer which help in solving the
problems they are.
Hardware
Software
Data
Example Desktop PC , not books, work stations ,smart phones etc
7. Hybrid Computer
The combination of features of analog and digital computer
is called Hybrid computer.
These computers use analog to digital and digital to analog converters to convert the
analog signals into discrete numbers and digital numbers to analog signals
Used in various areas of engineering,
space vehicle simulation, passenger flight
radar system, also used to control robots.
Example in hospital intensive care unite (ICU),a machine is used to monitor the blood pressure
and temperature of the patient .
Digital thermometer and ECG machine are example of hybrid computer
8. On the basis of size and capacity
Super Computers
They are very powerful and expensive and huge size computer
They are used in complex scientific applications like geological data .
genetic engineering
They are the fastest calculating device ever invented and are not used for
commercial data processing
They have huge primary memory and the most advanced capabilities
They support multiprocessing and parallel processing and allow thousand
of users to use it at the same time
Their operating system is also very complex.
9. Mainframe Computers
They are not as powerful as super computers but are extremely expensive.
They are multi-programing , multi-user and high performance computer.
They operate at a very high speed
They have very large storage capacity and can handle the workload of many
users.
The processing speed of mainframe computers is measured in MIPS(Million
Instructions Per second) i-e 200-1200 MIPS
They are used in organizations where many people require frequent access to
same data like banks , insurances company , airlines etc
10. Mini computers
Mini Computers are much smaller in size than mainframe computers.
They are suitable for small business requirement of a server or host which
supports hundreds of users at a time .
In business they are used for invoicing stock control payroll sales analysis
production planning etc
Their speed of operations and memory space is lesser the mainframe computer
Example mini computers IBM 8000 seriesm
11. Micro Computers
Micro computers are small , low cost and single user digital computer.
Microcomputers are stand alone computers but they can be connected
together using internet and wires to create a network of computers that
can serve more than one user .
Desktop computers notebooks , laptops tablets smart phones