GENERATIONS OF A COMPUTER

GENERATIONS OF A COMPUTER

1. First Generation Computers

·         Vacuum tubes were used which produce more heat

·         Speed of computing was measured in milliseconds

·         Limited storage capacity

·         punched cards were used for I/O operation

2. Second – Generation Computers

·         Transistors and diodes were used.

·          Speed of computing was measured in microseconds

·          Consider about reduction of heat

·          Remarkable improvement in reliability

·          Storage capacity was increased

·          Magnetic tapes were used instead of punching cards.

3. Third Generation Computers

·          Integrated Circuits were used.

·          Speed is measured in nanoseconds

·          Occupied less space.

·          devices like visual display unit for I/O devices

 4. Fourth – Generation Computers

·          Use of micro processor chip

·          Speed was measured in nano and picoseconds

·          Occupied less space

·          Commonly available as personal computers

·          Mini & micro Computers are developed from micro-processor 

5. Fifth – Generation Computers:

·         Use of super large-scale integration (SLSI) chip in computer (super computers)

·         Capable of performing millions of instructions per seconds (MIPS)

·         Processing speed is high.

·         Use of RICS (reduced instructions set computing) for processing

      Super computers are expensive