A device that works on the idea that something is on or off. In computers 0=off 1=on. The abacus was considered digital because the beads were either on of off.
the abacus replaced the abaci
An abacus measures nothing, it is a device used for calculation
it is the abacus. :D :D :D i got is dummies
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The ancient Chinese also had their own abacus device for calculating purposes
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.
It is a device used for counting in ancient times
The calculator.