COMPUTER HISTORY AND EVOLUTION
DEVELOPMENT OF COMPUTERS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Bones
|
|
|
Rods
|
|
|
Stones
|
|
|
Pebbles
|
Detailed explanation-1: -Napier’s bones is a manually-operated calculating device created by John Napier of Merchiston, Scotland for the calculation of products and quotients of numbers. The method was based on lattice multiplication, and also called rabdology, a word invented by Napier. Napier published his version in 1617.
Detailed explanation-2: -Napier’s bones, also called Napier’s rods, are numbered rods which can be used to perform multiplication of any number by a number 2-9.
Detailed explanation-3: -Napier’s bones are three dimensional, square in cross section, with four different rods engraved on each one. A set of such bones might be enclosed in a convenient carrying case. A rod’s surface comprises 9 squares, and each square, except for the top one, comprises two halves divided by a diagonal line.