Abacus, the oldest calculator
Recorded in the ninth wire.
The Latin word is derived from ἄβαξ abax which means something without a base, and colloquially, any piece of rectangular material.
Sometimes the beads are aligned horizontally, such as in the Russian abacus, or vertically, as in the Chinese and Japanese abaci.
Description: This was verified when the of visualisers showed heightened activity when calculating, compared with others using an actual abacus to perform calculations.
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Well, but the above-mentioned strategy can only be utilized in case of numbers that are small.
Older models have another 4-bead wire for quarter- which were minted until 1916.
Photo credit: Wikipedia Roman Abacus — was really more of a table with three different types called the dust abacus, the line abacus and the grooved abacus.
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