4. I Generation : 1945-55
II Generation : 1955-65
III Generation : 1965-75
IV Generation : 1975-89
V Generation : 1989 to present
Generations & its Lifespan
5. Generation I :
1940 -1955
Vacuum Tubes
Lee De Forest
Used vacuum tubes as the basic
components for memory and
circuitry for CPU
6. Batch Processing Operating System
No compiler or no Assembler to
process instruction of 1GL
Machine code
Input through Front panel Switches
Direct to CPU
7. UNIVAC -1951
(Universal Automatic Computer)
First fully electronic digital
computer built in the U.S.
Created at the University
of Pennsylvani
UNIVAC weighed 30 tons
contained 18,000 vacuum
tubes
8. Advantages
Execution is very Fast ,
Efficient.
Calculate data in
millisecond
Vacuum tube technology
Disadvantages
Difficult to fix the code
Large in size
Large Energy
Air conditioning required
Not reliable
Non portable
Machin language
Non versatile
Very Faulty