nops its not a digital device
It not analog, its digital. Analog devices are continuous, digital devices have discontinuous states. As the only valid states of an abacus have each bead either up or down (never in the middle) it has discontinuous states and is digital.
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 difference is that an abacus uses beads to calculate. A calculater uses solar energy or batteries to make its digital numbers. In other words an abacus uses beads and a calculater uses buttons you press to put numbers on the calculaters screen.
China invented the abacus .
disadvantage of abacus
who discover abacus
The Chinese abacus
An Abacus has beads and strings.
How did the abacus occur?
The First appearance of an abacus was in Sumeria around 2700 to 2300 BC.