Generations of Computer - Notes Computer Basics, Computer Application in Pharmacy

Generations of Computer

1st generation (1946-56)      

1. Very large size
2. Vacuum tubes were used for data
3. These tubes a lot of heat
4. Very expensive
5. Speed low
6. 18000 tubes
7. Hardware problems

2nd generation (1956-64) :-

1. Vacuum tubes were replaced with transistors
2. Size small or speed high
3. Less hardware problems

3rd generation (1964-71) :-

1. Transistors were replaced with IC.(integrated circuit)
2. Size small
3. Speed very high .

4th  generation (1971-80):-

1. Speed naro second , milli second, pico  second
2. IC were replaced with VLSIC :Very Large Scale Integrated Circuit.

5th generation (1980-present) :-

1. Different size of computers
2. Internet
3. Multimedia
4. Computer has so advanced, used in almost every field.