Third generation of computers started with the development of ............ .

Question

Accepted Answer

The correct option is (3):
The development that marked the beginning of the **Third Generation** of computers (c. 1964-1971) was the **Integrated Circuit (IC)**, often called a microchip. The IC, invented by Jack Kilby and Robert Noyce, was a profound technological leap because it allowed for the miniaturization and combination of numerous electronic components—such as transistors, resistors, and capacitors—onto a single, tiny silicon chip. This breakthrough resulted in computers that were drastically smaller, faster, more reliable, and significantly cheaper to produce than their predecessors. Instead of requiring massive, dedicated, air-conditioned facilities, these new machines consumed far less power and generated substantially less heat, leading to greater commercial adoption. Furthermore, the IC enabled the use of high-level programming languages and the introduction of advanced operating systems that supported core concepts like multitasking and time-sharing.

The incorrect option is (1):
The **Vacuum tube** was the fundamental electronic component that defined the **First Generation** of computers, which spanned roughly from 1940 to 1956. These tubes were large, fragile, generated enormous amounts of heat, and consumed a massive amount of electricity. First-generation machines like the ENIAC were unreliable and required constant maintenance due to the high failure rate of the tubes. This is the oldest technology among the options and was completely replaced before the Third Generation began.

The incorrect option is (2):
The **Microprocessor** is the defining technology of the **Fourth Generation** of computers, which started around 1971. A microprocessor represents the culmination of IC technology, packing the entire Central Processing Unit (CPU) onto a single chip using Very Large-Scale Integration (VLSI). This component enabled the creation of the personal computer (PC) and the computer revolution we recognize today. Its development came *after* the period of the Third Generation.

The incorrect option is (4):
The **Transistor** was the core technology that defined the **Second Generation** of computers, from approximately 1956 to 1963. The transistor was a vast improvement over the vacuum tube, as it was smaller, faster, more energy-efficient, and more reliable, leading to smaller and cheaper computers. While the transistor is the key component *within* an IC, its initial introduction as the primary switching device belongs distinctly to the second generation of computing.