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

    Who is the inventor of “Difference Engine”?

    Right Option : B
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    Question : 2

    A byte consists of ___________________

    Right Option : C
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    Question : 3

    Match the following :

    Inventor Invention
    (a) Herman Hollerith (i) Electronic Numerical Integrator And Computer
    (b) Blaise Pascal (ii) Electronic Delay Storage Automatic Calculator
    (c) JP Eckert and JW Mauchy (iii) Tabulating Machine
    (d) John Von Neumann (iv) Pascaline

     

    Right Option : B
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