Supercomputer

Supercomputer is a computer which performs the highest operational rate for computers. The supercomputers are typically used for scientific and engineering application where they must handle huge amount of database and great amount of computations.

Mainframe Computer

Mainframe computer is that computer which is used in huge business where the data is processing in huge amount and processed the data so many times where may require too much CPU cycles (some of the computers may flunk). Mainframe computers are very similar to the supercomputers but the supercomputer calculates algorithms which has so many integration and differentiation and lots of calculation steps, where the mainframes are calculate simple calculations like addition and subtractions.

Micro Computer

Microcomputer is a computer which has microprocessor as a central processing unit (CPU). Microcomputers has cpu, memory, and input and output device. This computers are physically very small than mainframe computer and supercomputers. Micro computers are also called personal computer (PC) which are designed for personal or individual use.

Mini Computer

Minicomputers are those computers which are mid size between microcomputers and mainframe computers. This computers are using in large enterprise  where 4 to 400 person can use this computer at a time. In recently mini computer evolved mid range of server computer eg. AS/400e.