Friday, 11 July 2014

JOHN NAPIER CALCULATING DEVICE,slide rule

JOHN NAPIER CALCULATING DEVICE(1550-1617):
John Napier developed the logarithms rules which are very useful in mathematics and computer technology. He was a Scottish mathematical scientist. The Logarithm table is designed by Napier as well which make revolutionary change in mathematics and Computing
Napier's invention led directly to the slide rule, first built in England in 1632 and still in use in the 1960's by the NASA engineers of the Mercury, Gemini, and Apollo programs which landed men on the moon. This slide rules is used to take sin, cos, tangent and other trigonometric & arithmetic calculation.
  
                      
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