Post on 04-Jan-2016
Computer GenerationComputer Generation
First Generation Second Generation Third Generation Fourth Generation Fifth Generation
Computer Generation Computer Generation
• 1940’s – early 1950’s• Vacuum tube as switch• Bulky, slow, easily heated• ENIAC(Electronic Numerical Integrator and Computer) • , UNIVAC• Stored program concept (Von
Neumann)• Assembly Language
Computer GenerationComputer Generation
1950’s – mid 1960transistor as switch Smaller and faster (x1000)Less heat, more reliable, cheapThe usage of high level language
beginsDEC-PDP-1
Computer GenerationComputer Generation
Late 1960’sSilicon chip as switch smaller and faster (x1000)More reliable
Computer GenerationComputer Generation
1970’s –currentSingle processor microchip as switch Very low cost and afforded by
individual
Computer GenerationComputer Generation
Japan founded artificial intelligence in the mid 1990
Expert system, natural languageCommunication and network
Generation Electronic circuit
Main Memory
Secondary Memory
Input Output Computer Size
1Vacuum Tube Magnetic reel -Magnetic reel
-Magnetic tape
-paper tape
-punch card
-punch card
-printer
Room size30 ton,1500 kps,18000 vacuum tube,140k/w
2transistor Magnetic
core-Magnetic tape- Magnetic disk
punch card punch card - printer
Drawer size
3Integrated circuit
Magnetic core
-Magnetic tape-Magnetic disk
-keyboard-Magnetic tape-Magnetic disk
-printer-video-display
Table size
4microprocessor
Semiconductor circuit
-magnetic disk-diskette-magnetic wave
-keyboard-Optical -recognition -Light pen-Graphic tablet
-printer-video -display-audio response
Typewriter size
HISTORY AND COMPUTER REVOLUTION