History and Generations of Computers

Charles Babbage: "Father of the Computer" — designed the Analytical Engine
Ada Lovelace: Considered the first computer programmer
ENIAC (1945): First general-purpose electronic digital computer

The five generations of computers, from vacuum tubes to artificial intelligence, and the technology that defines each.

📖 ~4 min read 💻 RRB NTPC / Group D — Computer Awareness

Generation	Period	Key Technology
First	1940-1956	Vacuum tubes
Second	1956-1963	Transistors
Third	1964-1971	Integrated Circuits (ICs)
Fourth	1971-present	Microprocessors (VLSI technology)
Fifth	Present & beyond	Artificial Intelligence (ULSI technology)

💡 First generation computers were huge, generated a lot of heat, and used vacuum tubes — making them unreliable and expensive to maintain.

This free chapter covers the key concepts. For complete coverage with 500+ MCQs, mock tests, and previous year analysis — grab the premium eBook.