• Super Computers
  •  Mainframes
  •  Minicomputers
  •  Microcomputers (Personal Computers)  
Computer Type Year of introduction Specific Computers Typical feature
Main Frame 1945 Mark 1, B 5000, IBM S/360 Large size, High cost
Mini Computer 1965 PDP-8, HP 2100 A, TDC-312 Medium size, Low cost
Micro Computer 1972 ORG 80, WIPRO 86, IBM PC Very small size, Very low cost
Super Computer 1976 CRAY-1, Cyber 203/205 Extremely High speed