What is a computer And Types of computers..?


What is a computer:-

Latin word “comutare” means calculation.
Electronic device
Can process data

Or
A system of interrelated components that perform the basic function of



History of computers:-

Abacus in 1500 by Chinese


Difference Engine by Charles Babbage in 1812
can calculate power of numbers



Electronic numeric integrator and computer (ENIAC) by Mauchly and Eckert(1946)




EDVAC (1950) by Von Numan

First non scientific computer.
Could be used for business.
Could store data.
But could not solve all the problems of that time.






Types of computers

DIGITAL COMPUTERS
Perform work on fix numbers. very accurate and high in speed
ANALOG COMPUTERS
They process information that is continues.
Used to measure natural quantities like temperature, pressure, speed etc.
HYBRID COMPUTERS
Have good qualities of both digital (accuracy) and analog (speed) used in radars, petrol pumps, and medical equipments.


Classification of computers

Mainframe computers
Mini computers
Micro computers
Super computers





Super computer
Also called number crunchers
V.v. high in speed and accuracy
Not for public use
Used in scientific research and very special places like atomic reactors and NASA



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