Computer Generations
Basic Computer: Generations of Computers
1. Overview
The evolution of computers is divided into five generations, each characterized by a major technological development that fundamentally changed the way computers operate, making them smaller, cheaper, more powerful, and more efficient.
2. The Five Generations (Summary Table)
| Generation | Period | Major Technology | Language Used |
|---|---|---|---|
| 1st | 1940-1956 | Vacuum Tubes | Machine Language |
| 2nd | 1956-1963 | Transistors | Assembly Language |
| 3rd | 1964-1971 | Integrated Circuits (ICs) | High-Level (FORTRAN) |
| 4th | 1971-Present | Microprocessors (VLSI) | C, C++, Python |
| 5th | Present-Future | Artificial Intelligence (ULSI) | Natural Language |
3. Key Characteristics
- First Generation: Huge size (ENIAC), high heat production, and very expensive.
- Second Generation: Transistors replaced vacuum tubes; smaller and faster.
- Third Generation: ICs made computers smaller and more reliable (Remote processing, Time-sharing).
- Fourth Generation: Introduction of the PC (Personal Computer). Uses Very Large Scale Integration (VLSI).
- Fifth Generation: Based on parallel processing and AI software.
4. Famous Examples
- 1st Gen: ENIAC, EDVAC, UNIVAC.
- 2nd Gen: IBM 1620, CDC 1604.
- 3rd Gen: IBM 360 series, Honeywell 6000 series.
- 4th Gen: Apple II, DEC 10.
5. Subject Card Prompts (Flashcards)
- Q: What was the primary technology used in the 1st generation of computers?
- A: Vacuum Tubes.
- Q: In which generation were Microprocessors introduced?
- A: 4th Generation.
- Q: What is the full form of IC?
- A: Integrated Circuit.
6. Practice MCQ
"Which technology is used in the 5th generation of computers to enable them to think and learn?"
A) Transistors
B) Integrated Circuits
C) Artificial Intelligence
D) Vacuum Tubes
(Correct: C - Artificial Intelligence)