What is a Computer?

Computer is an electronic machine, which takes information as input, process it and controls the operation, which could be expressed in logical forms.  

PRIME FUNCTIONS OF COMPUTER  

 Accepts data as input
 Processes data processing
 Gives output
 Store the output for further use


Father of Computer: Charles Babbage

Parameters to Judge Power of Computer  Speed  Reliability  Storage


TYPES OF COMPUTER 

The distinctive types of Computers are as follows:
 Micro Computers
Personal Computer is also called Micro Computer, which is available in many sizes and shapes. Their shapes and sizes vary from tiny Personal Digital Assistant to the big computer towers. The range of Personal Computer includes Palmtop (PPC), Laptop, Handheld (HPC) etc.
 Mini Computer
These computers are more powerful as compares to Micro Computers. They have high memory, good processing speed. It is also used as server in many applications. It is multiprocessing system capable to support 4 to 200 users simultaneously. It is used to carry out tasks like Engineering and Computer Aided Designs.
 Mainframe Computer
Mainframe computers have high memory and processing speed due to which, it is considered as heart of computer network that enable a large number of people to work at same time. These type of computers are used for large scale computing
 Super Computer
Super Computers are very powerful and high performance machine, which are ideally used for complex applications and scientific computations. Some examples of Super Computers are EKA, SAGA-220, Anurag.