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An analog computer or analogue computer is a type of computation machine (computer) that uses physical phenomena such as electrical, mechanical, or hydraulic quantities behaving according to the mathematical principles in question (analog signals) to model the problem being solved.
An analog computer is a form of computer that uses electrical, mechanical, or hydraulic phenomena to model the problem being solved. More generally an analog computer uses one kind of physical quantity to represent the behavior of another physical system, or mathematical function. Modeling a real physical system in a computer is called simulation.
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An analog computer is a type of computer that uses analog signals, which are continuous physical quantities, to model and solve problems. These signals can be electrical, mechanical, or hydraulic in nature. Analog computers were widely used in scientific and industrial applications, and were often faster than digital computers at the time.
It is the oldest known example of an analogue computer. [ 3 ] [ 4 ] [ 5 ] It could be used to predict astronomical positions and eclipses decades in advance. [ 6 ] [ 7 ] [ 8 ] It could also be used to track the four-year cycle of athletic games similar to an Olympiad , the cycle of the ancient Olympic Games .
Built around the beginning of the 1st century BCE, the Antikythera Mechanism is the oldest known analog computer in human history, and there’s an enduring mystery surrounding what it was used for.
The first example of using vacuum tubes for computation, the Atanasoff–Berry computer, was demonstrated in 1939. Vacuum-tube computers were initially one-of-a-kind designs, but commercial models were introduced in the 1950s and sold in volumes ranging from single digits to thousands of units.
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