Classification Of Computer

                    Classification of the computers based on their data processing abilities .They  are classified according to purpose ,data handling and functioning .

 Classify by Purpose: 

They are two type of computers according to purpose.
General purpose 
 Specific purpose  
General purpose computers are built to perform a range of task and have the ability to store a large amount of data (programmes) .The efficiency of general purpose computers are low.
Specific purpose computers are design to perform a specific task . The  efficiency of   specific purpose computers are  much better than general purpose computers

Classify by Data handling :

There are three types according to data handling.
Analog computers 
Digital computers 
Hybrid computers
Analog computers :The principle of analog computers is measuring . These measuring are translated into data .such computers do not deal with the numbers .They measure continuous physical magnitude .
Digital computers : They operates with numbers or information.The data in digital computers are represented in digital form(0s and 1s).The results of digital computers are more accurate , efficient and faster .
Hybrid computers : They contain the features of  both analog computers and digital computers .Analog computers are use for computational purposes and digital computers are use for storage .

Classify by function :

Servers
Workstations 
Information Appliances
Embedded computers
Servers : Server computers provide a specific service. Such as Database Server is a computer to provide a Database service. Web Servers provide a web page and web applications
Workstations: These computers are intended to serve one user and contain special hardware not found on a personal computer .
Information  Appliances: These computers are design to perform a specific tasks . such as editing text and playing music
 Embedded computers : These computers are intended to operate a specific machine or device . Automobile may contain a number of embedded computers . Washing machine and DVD player contain only one embedded computer.

Classify by Size:-

 There are four categories
Micro computers 
Mini computers 
Main frame computers 
Super computers 
Micro computer system : These are normally standalone computers known as Personal computer (PC) or desktop computers . It is a small computer based on microprocessor .  These are expensive computers and only one user can use at one time . It contain two type of memories RAM  and ROM .
user friendly software are use in micro computer .
Example are :
Desktop computer
 In_car computer
Game consoles
laptops and notebook computer
Smartphone
Programmable calculator
Mini computer system : Special software operate these computer . They can support more than one person usually from 4-200 user simultaneously .Mini computer are expensive and use as departmental computer or governmental institutions for data processing like hospital , universities , business. They are use as a server .
Main frame computer system : It is very large and expensive computers . hundred and thousand user use it simultaneously . It is mainly use in hospitals , universities  and world governing body .
Super computer system : Super computers are fastest and very expensive . These computers require a lot of mathematical calculations .  Modern super computers  system are equipped with many processors enabling them to handle complex operation for example weather forecast . First super computer was developed by VON -Newman .