First generation computers

 Features:-

• The first computers used vacuum tubes for circuitry and magnetic drums for memory, and were often enormous, taking up entire rooms.

• Magnetic drums were once use das a primary storage device but have since been implemented as auxiliary storage devices. They were very expensive to operate and in addition to using a great deal of electricity, generated a lot of heat.

• field of application included weather prediction, atomic-energy calculations, cosmic-ray studies, thermal ignition, random-number studies, wind-tunnel design, and other scientific uses. 

• Its features are as follows:

1. these computers were based on vacuum tube technology.

2. Punched cards were used as input device.

3. These machines were unreliable and lack of versatility and speed.

4. They were very expensive to operate and in addition to using a great deal of electricity.

5. First generation computers relied on machine language to perform operations.

More ever we can put some more features in first generation:

1. Vacuum tubes were the only electronic component used in them. 

2. The computers were very large in size,slow in speed and not so reliable.

3. They heated very soon due to thousands of vacuum tubes.They consumed a large amount of energy.

4. Air conditioning was required.

5. Constant maintenance was required.

6. Non-portable.

7. Costly commercial production.

8. Limited commercial use.

9. Used machine language only.

10. Used magnetic drums which provide very less data storage and punch cards for input. batch processing was used. 

11. Not versatile and very faulty.

e.g. UNIVAC-1