![]() ![]() The presentation of the Edison Effect in 1885 provided the theoretical background for electronic devices. Telephone switching came to be based on this technology, which led to the development of machines that we would recognize as early computers. The introduction of electric power in the 19th century led to the rise of electrical and hybrid electro-mechanical devices to carry out both digital (Hollerith punch-card machine) and analog (Bush’s differential analyzer) calculation. 1624) and Babbage's Difference Engine (1822) are other examples of early mechanical analog computers. Later devices such as the castle clock (1206), slide rule (c. Analog computing dates back several millennia as primitive computing devices were used as early as the ancient Greeks and Romans, the most known complex of which being the Antikythera mechanism. ![]() The ancient abacus was perhaps the first digital computing device. Computers and electronics play an enormous role in today's society, impacting everything from communication and medicine to science.Īlthough computers are typically viewed as a modern invention involving electronics, computing predates the use of electrical devices.
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