First Generation
- The period of first generation was(1940-1956)
- First generation of computer started with using vacuum tubes as the basic components for memory and circuitry for CPU(Central Processing Unit). These tubes like electric bulbs produced a lot of heat and were prone to frequent fusing of the installations, therefore, were very expensive and could be afforded only by very large organisations.
- In this generation mainly batch processing operating system were used. In this generation Punched cards,
Paper tape, Magnetic tape Input & Output device were used. - There were Machine code and electric wired board languages used.
The main features of First Generation are:
- Vacuum tube technology
- Unreliable
- Supported Machine language only
- Very costly
- Generate lot of heat
- Slow Input/Output device
- Huge size .
- Need of A.C.
- Non portable
- Consumed lot of electricity
- Some computer of this generation were: ENIAC , EDVAC ,UNIVAC, IBM-701, IBM-650