A computer is an electronic device that manipulates information or data. It has the ability to store, retrieve, and process data.
Early modern computers are typically grouped into four "generations." Each generation is marked by improvements in basic technology. These improvements in technology have been extraordinary and each advance has resulted in computers of lower cost, higher speed, greater memory capacity, and smaller size.
The period of first generation was 1942-1954.
- Vacuum tube technology
- 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: