Perhaps
one of the most amazing inventions ever, almost every person is familiar with
this device particularly the fact that it is used not only by mathematicians
but is put into practice by almost everyone. The first calculator was created
in the Late 1960s and the pocket version became available in 1970.
The
electronic calculators of the mid-1960s were large and heavy desktop machines
due to their use of hundreds of transistors on
several circuit boards with a large power consumption that required an AC power
supply.
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