The document summarizes the five generations of computers. The first generation used vacuum tubes and had very low memory capacity. Examples included ENIAC and UNIVAC. The second generation used transistors and had memory up to 1000 MB. Examples were IBM-PC and Marks-I. The third generation used integrated circuits and had memory up to 250 GB, with examples like IBM-PC, HCL, and HP. The fourth generation uses microprocessors with LSI chips and has memory over 1000 GB. Examples are IBM-PC, HCL, HP, and Dell. The fifth generation covers present and future computers.

3. 1st Generation of Computer
Time Duration: 1945-1954.
Process Technology: Vacuumed Tube.
Memory Capacity: Very Low (approx 100 words)
Ex. Of Computer: ENIAC, UNIVAC etc.
Programming Language: Machine Language.

4. Full Forms
ENIAC: Electronic Newronic Internal And Calculate.
UNIVAC: Universal Automatic Computer.
EDVAC: Electronic Discrete Variable Automatic
Computer.
EDVSAC: Electronic Discrete Variable Storage
Automatic Computer.

6. 2nd Generation of Computer
Time Duration: 1955-1964.
Process Technology: Transistors.
Memory Capacity: up to 1000 MB.
Ex. Of Computer: IBM-PC , Marks-I etc.
Programming Language: Machine Language,
Assembly Language.

8. 3rd Generation of Computer
Time Duration: 1965-1974.
Process Technology: IC (Integrated Circuit).
Memory Capacity: Up to 250 GB.
Ex. Of Computer: IBM-PC, HCL, HP etc.
Programming Language: Machine Language,
Assembly Language, High Level Language.

10. 4th Generation of Computer
Time Duration: 1975 - Till Date.
Process Technology: Micro Process with LSI
Chip.
Memory Capacity: Up to 1000 GB or Higher.
Ex. Of Computer: IBM-PC, HCL, HP, Dell etc.
Programming Language: Machine Language,
Assembly Language, High Level Language,
4gls.

11. Full Forms
LSI: Large Scale Integration.
4gls: 4th Generation Language.
HCL: Hindustan Computers Limited.
HP: Hewlett Packard.
IBM-PC: International Business Machines.

13. 5th Generation of Computer
Time Duration: Present and Next.