1. Computer Generation First Generation Second Generation
Third Generation
Fourth Generation
Fifth Generation

2. Computer Generation First 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

3. Computer Generation Second Generation 1950’s – mid 1960
transistor as switch
Smaller and faster (x1000)
Less heat, more reliable, cheap
The usage of high level language begins
DEC-PDP-1

4. Computer Generation Third Generation Late 1960’s
Silicon chip as switch
smaller and faster (x1000)
More reliable

5. Computer Generation Fourth Generation 1970’s –current
Single processor microchip
as switch
Very low cost and afforded by individual

6. Computer Generation Fifth Generation
Japan founded artificial intelligence in the mid 1990
Expert system, natural language
Communication and network
Fifth Generation

7. 1 2 3 4 HISTORY AND COMPUTER REVOLUTION Generation Electronic circuit
Main Memory
Secondary Memory
Input
Output
Computer Size 1
Vacuum Tube
Magnetic reel
-Magnetic reel
-Magnetic tape
-paper tape
-punch card
-printer
Room size
30 ton,1500 kps,18000 vacuum tube,140k/w 2
transistor
Magnetic
core
- Magnetic disk
punch card
punch card - printer
Drawer size 3
Integrated circuit
Magnetic core
-Magnetic disk
-keyboard
-video
-display
Table size 4
microprocessor
Semiconductor circuit
-magnetic disk
-diskette
-magnetic wave
-Optical
-recognition
-Light pen
-Graphic tablet
-audio response
Typewriter size