Question

EXPLAIN FIRST, SECOND AND THIRD GENERATION OF COMPUTERS?​

Answer 1

Answer:

First of all, the distinguishing characteristics of each of these generations:

First generation (1940–1956) used vacuum tubes. Examples: ENIAC, UNIVAC I, IBM 650, IBM 701

Second generation (1956-1963) used discrete transistors. Examples: IBM 7090 and 7094, UNIVAC 1107, PDP-1 and 8

Third generation (1964-1971) used integrated circuits (but not microprocessors). Examples: IBM System/360, UNIVAC 1108, PDP-8/I, PDP-11/20 and PDP-11/45

What they had in common:

All of the large (later called mainframe) computers used punched cards for input and output. Except for early first-generation computers, they used core memory for short-term storage and magnetic tapes for long-term storage and line printers for printed output.

Minicomputers (second and third generation) more often used punched paper tape for I/O. Both high-speed readers/writers, and low-speed (Teletypes such as the ASR-33) were used. The latter were also used for printed output, along with line printers in larger systems. Minicomputers typically used smaller format magnetic tapes (e.g. DECtape). And they too used core memory.

Explanation:

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Answer 2

Answer:

First Generation The period of first generation: 1946-1959. Vacuum tube based.Second Generation The period of second generation: 1959-1965. Transistor based.Third Generation The period of third generation: 1965-1971. Integrated Circuit based.The period of fourth generation: 1971-1980. VLSI microprocessor based.The period of fifth generation: 1980-onwards. ULSI microprocessor based.

Explanation:

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