ENIAC served as the first-generation laptop. Second-generation computers were entirely built with transistors rather than vacuum tubes.
Five Generations of Computer
What is the difference between the 1st, 2nd, 3rd, 4th, and 5th generation of computers? - Quora
GENERATION OF COMPUTER PROJECT AND LEARNING: Second Generation Computers (1956- 1963)
Difference between 1st generation and 2nd generation computers
First Generation Computers, PDF, Microcomputers
Difference between first and second generation of computers.
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Generations of Computer Explained
GENERATION OF COMPUTERS.