Pencil and paper, abacus, mechanical calculator, log tables, electronic calculator (or computer), proportional weighing machines.
pictures of calculating devices with their inventors
The china had one with rows wooden round balls on wires, 3 rows of them, 3 balls & 3 balls =6 in the last row, that was add, to subtract it was to the left cool
Abacus, slide rule, computer, calculator.
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The devices could do most of the calculation work by itself
Explain various storage devices and their characteristics?
The earliest recorded calculating device is the abacus. Used as a simple computing device for performing arithmetic, the abacus most likely appeared first in Babylonia (now Iraq) over 5000 years ago.
The device used for calculating and processing data in a computer system is known as the Central Processing Unit, or CPU for short.
Texas Instruments received the patent - see relevant link below .
MODEM,
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because that's all they had but now we have didital ones that are better