1. Computer Systems Computer Generations and Types

2. COMPUTER GENERATIONS 1. VACUUM TUBES: 1946-1959

3. COMPUTER GENERATIONS 1. VACUUM TUBES: 1946-1959 2.TRANSISTORS: 1957-1963

4. COMPUTER GENERATIONS 1. VACUUM TUBES: 1946-1959 2. TRANSISTORS: 1957-1963 3.INTEGRATED CIRCUITS: 1964-1979

5. COMPUTER GENERATIONS 1. VACUUM TUBES: 1946-1959 2. TRANSISTORS: 1957-1963 3. INTEGRATED CIRCUITS: 1964-1979 4.VERY LARGE-SCALE INTEGRATED (VLSI) CIRCUITS: 1980- PRESENT

6. SUPERCOMPUTER TERAFLOP: TRILLION CALCULATIONS/SECOND HIGHLY SOPHISTICATED COMPLEX COMPUTATIONS FASTEST CPUs LARGE SIMULATIONS STATE-OF-THE-ART COMPONENTS EXPENSIVE

7. MAINFRAME LARGEST ENTERPRISE COMPUTER 5O MEGABYTES TO OVER ONE GIGABYTE RAM COMMERCIAL, SCIENTIFIC, MILITARY APPLICATIONS MASSIVE DATA COMPLICATED COMPUTATIONS MIPS: Millions of Instructions per second

8. MINICOMPUTER MIDDLE-RANGE 10 MEGABYTES TO OVER ONE GIGABYTE RAM UNIVERSITIES, FACTORIES, LABS USED AS FRONT-END PROCESSOR FOR MAINFRAME

9. DESKTOP OR PORTABLE 64 KILOBYTES TO OVER 128 MEGABYTES RAM PERSONAL OR BUSINESS COMPUTERS AFFORDABLE MANY AVAILABLE COMPONENTS CAN BE NETWORKED MICROCOMPUTER

10. LAPTOPS & SMALLER LAPTOP (OR NOTEBOOK): Briefcase type package, very portable, can be inexpensive, can connect to other computers or networks HAND-HELD (OR PALMTOP): Sub-miniature, wireless computer. Growing in sophistication and connectivity