COMPUTER HISTORY AND EVOLUTION
DEVELOPMENT OF COMPUTERS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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On tabulating machines, metal pins would pass through holes in a punch card and make contact with a vial of ____, completing an electrical circuit.
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Water
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Mercury
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Aluminum
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Electrons
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Explanation:
Detailed explanation-1: -Data is stored on the card by punching holes, which represent letters or numbers, in specific column locations that relate to the information being recorded. To read this data, the card must be run through a machine that can detect or ‘sense’ the location of the holes.
Detailed explanation-2: -The tabulating machine was a counting machine used for the first for tabulating U.S. census data in 1890. Herman Hollerith invented the tabulating machine. It kept track of the number of cards that had a hole punched at a specific location.
There is 1 question to complete.