classifaication of computer

Computer is one of the most powerful and useful innovations in human society.With the use of computer,people are suddenly able to perform an incredible amount of computations at high speeds with almost 100% accuracy.Computer range from the very small to the very large.Some are capable of doing millions of calculations in single seconds,while others may take long time to even perform simple calculations.
Actually, a computer is a collection of hardware and software components that help us to complete many different tasks at enormous speed. 
Types of Computers
        Computers are classified on the basis of working principle of working principle,on the basis of size,on the basis of model and on the basis of brand.
On the basis of working principle:analog,digital,hybrid
On the basis of size:super,mainframe,mini,macro
On the basis of brand:IBM computer,IBM compatible,apple/macintosh
On the basis of model:XT,AT,PS/2