Fill in the blanks
a) ……………..was the first calculating deice made by man.
b) Napier Bones device invented in ……………..AD.
c)……………….is considered as the world’s first calculator.
d)………………….is known as the father of computer.
e) Magnetic Drums was used for………………..
Answers
Explanation:
a) An abacus
An abacus is considered one of the first calculating devices invented by man. It is a manual device which takes time and a great deal of experience to master. An abacus uses several rows of beads to represent numbers; each row stands for a place value and the arrangement of beads in a row stands for a digit
b) 17 AD
Napier's bone is an abacus created by John Napier in 17 AD for calculation of products and quotients of numbers. Sir John Napier was a great mathematician of Scotland. This was a manual device. Napier's bone is also called Napier's rod.
c) In October 1961, the world's first all-electronic desktop calculator, the British Bell Punch/Sumlock Comptometer ANITA (A New Inspiration To Arithmetic/Accounting) was announced. This machine used vacuum tubes, cold-cathode tubes and Dekatrons in its circuits, with 12 cold-cathode "Nixie" tubes for its display.
d) Magnetic drums, which had fixed read/write heads for each of many tracks on the outside surface of a rotating cylinder coated with a ferromagnetic material, were used for both main and auxiliary memory in the 1950s, although their data access was serial.
HOPE THIS WAS HELPFUL
Answer:
a) Abacus
b) 1617
c) Pascaline
d) Charles Babbage
e) Storage
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