Question

Write a note on mainframe, minicomputer and microcomputer. 

Answer 1

 Mainframe Computer:

 These are very large, powerful and expensive.

 They can support hundreds and thousands users at a time.

 Modern mainframe computers use cutting edge technology. 

 They can execute trillions of instructions per second.

 Examples are IBM zEnterprise EC12, EC196, HP16500 etc.

 Minicomputer:

 These are introduced in 1960s after development of IC chips.

 These are less expensive and smaller than mainframe computers.

 They can execute Billions of instructions per second.

 They are also using cutting edge technology now a days.

 Their examples are IBM System/36 and HP 3000.

 Microcomputer:

 These are less expensive and smallest computers.

 These are being used in all application areas like homes, offices etc.

 These are introduced in 1970s after development of micro-processor.

 They can execute millions of instructions per second.

 Their examples are IBM, HP, Dell, Toshiba etc.