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Computer generations lecture
- 2. Key for Computer Generations • Time Frame • Circuit Components • Elements per Component • Internal Storage • Memory Capacity • Data Input • Popular Computers and Companies at that time
- 3. First Generations 1951- 1958 • Vacuum Tubes • Magnetic Drum • 4,000 bits • Hard Wire Programs in computers • IBM 650, Univac I • ENIAC
- 4. Second Generation 1959-1964 • Transistors • Magnetic Cores • 32,000 bits • Punch Cards • CDC, GE, IBM
- 5. Third Generation 1965-1974 • Silicon Chips (Integrated circuits)= IC • Cores, IC’s • 128,000 bits • Keyboard Entry • IBM, NCR, Honeywell
- 6. Fourth Generation 1975-1989 • Silicon Chips (Large scale integrated circuits)=LSI • IC’s, LSI’s • 100 million bits • Read programs off disks • Apple, Xerox, Texas Instrument, Hewlett- Packard
- 7. Fifth Generation 1990-present • Silicon Chips ( Very Large Integrated Circuits) VLSI • LSI’s, VLSI’s • Unlimited • CdRom, Optical Disk • NEC, Packard Bell, Compaq, Other Clones