Introduction to computers | C Programming Language Tutorial

A computer is an electronic device capable of manipulating numbers and symbols under the control of a set of instructions known as computer program.
They are different stages of computers (generation)
1.First Generation Computers
1. Vacuum tubes were used which produce more heat
2. Speed of computing was measured in milliseconds
3. Limited storage capacity
4. punched cards were used for I/O operation

2. Second – Generation Computers
1. Transistors and diodes were used.
2. Speed of computing was measured in microseconds
3. Consider about reduction of heat
4. Remarkable improvement in reliability
5. Storage capacity was increased
6. Magnetic tapes were used instead of punching cards.

3. Third Generation Computers
1. Integrated Circuits were used.
2. Speed is measured in nanoseconds
3. Occupied less space.
4. devices like visual display unit for I/O devices

4. Fourth – Generation Computers
1. Use of micro processor chip
2. Speed was measured in nano and picoseconds
3. Occupied less space
4. Commonly available as personal computers
5. Mini & micro Computers are developed from micro-processor

5. Fifth – Generation Computers:
1. Use of super large-scale integration (SLSI) chip in computer (super computers)
2. Capable of performing millions of instructions per seconds (MIPS)
3. Processing speed is high.
4. Use of RICS (reduced instructions set computing) for processing
5. Super computers are expensive.