Which invention made it possible to have an entire computer on a single circuit board?answerVacuum tubesSiliconTransistorsMicrochip

The invention that made it possible to have an entire computer on a single circuit board is the Microchip.

Explanation:

1. Microchip Definition: A microchip, also known as an integrated circuit or IC, is a compact piece of silicon that can contain hundreds to millions of electronic components such as transistors, capacitors, and resistors. This miniaturization allows complex electronic systems to be created on a single piece of material.

2. Historical Context: Prior to the development of microchips, computers were built using discrete components like vacuum tubes and transistors. Vacuum tubes were bulky and produced a lot of heat, while transistors, although smaller and more efficient, still required manual assembly of various parts.

3. Impact of Microchips: The introduction of microchips revolutionized computing by allowing entire processors to be fabricated on a single board, leading to the development of personal computers, smartphones, and numerous electronic devices that we utilize today. The ability to integrate multiple functions in a compact form drives both performance and efficiency.

Conclusion:

In summary, while vacuum tubes and transistors were crucial technologies in the evolution of computers, it was the microchip that enabled the complete integration of a computer's functions onto a single circuit board.