History of Computers


 
 
Concept Explanation
 

History of Computers

Computer is not the creation of one day, rather it took a long period for the development of modern computer. History of computer is described below:

Abacus 1602

Inventor : China

Characteristics:

  • First mechanical calculating device.
  • A horizontal rod represents the one, tens, hundred, etc.
  • Applications:

  • Used for addition and subtraction operations.
  • Calculation of square roots can also be performed.
  • Napier's Bones 1617

    Inventor : John Napier (Scotland)

    Characteristics:

  • Three dimensional structure.
  • Holding numbers from 0 to 9 only.
  • Represent graphical structure of calculating result.
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    Sample Questions
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    Question : 1

    Match the following 

    Invention   Inventor
    (a) IBM-650 computer (i) Charles Babbage
    (b) MARK-1 (ii) J. Presper Eckert and John Mauchy
    (c) Universal Automatic Computer (iii) Howard Aiken
    (d) Analytic Engine (iv) IBM company

     

    Right Option : A
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    Explanation
    Question : 2

    The term ‘Computer’ is derived from._________________

    Right Option : A
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    Explanation
    Question : 3

    Tabulating machine was the first electromechanical machine developed by _____________________

    Right Option : A
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    Explanation
     
     


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