micro computers are small pc's that we use..they are single-

user operated systems more general used by an

individual...they are use for general purpose like

docementation,individual service,etc..

mini computers are those computer that lie betn micro and

super computer in size....they are stand-alone

computers...they are used for some special purposes like

payroll processing in large companies,accounting in small

enterprises....

super computers are the computers large in size than micro

or mini computers...they are multiple computers processing

in parallel...they are used for special purpose in

extensive large companies where speed must be very fast for

processing very large databases...eg:Cray Supercomputer