Early computers took up entire rooms. which of these dramatically reduced the size of computers?

microchips

transistors

compact discs

digital-video discs

microchips  

Explanation:

The size and price of computers began to decline after the 1950s. The giant machines were not profitable because of the constant maintenance costs. The main need was to replace the electric valves with a new technology that would allow a more discreet storage and would not be so responsible for generating excessive heat, avoiding overheating.  In this period, the research of the integrated circuits, the microchips, responsible for the increasing miniaturization of the electronic equipment begins.

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