Each generation is set apart from the previous generation because of an innovation. Choose the generation marked by each of these innovations.

transistors
: integrated circuits
: vacuum tubes

Second Generation: transistors

Third Generation: integrated circuits

First Generation: vacuum tubes

Explanation:

Generations of computers are categorized based on the technologies that were used in them.

Given innovations or technologies are:

transistors :

Transistors were introduced in the second generation in place of vacuum tubes.

integrated circuits :

Integrated circuits were introduced in the third generation. An IC consists of multiple transistors.

vacuum tubes:

The very first generation of computers used vacuum tubes to do the calculations. the only drawback was that the tubes used to heat up very soon.

Hence,

Second Generation: transistors

Third Generation: integrated circuits

First Generation: vacuum tubes

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