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.
The abacus is not analog, but digital in design - unlike the minute hand and hour hand of a clock, the counters of an abacus are not interconnected in movement, but depend entirely on your fingers to move the beads.
However, "suspended beads" may be use by the Chinese in advance operations.
Examples of analog devices are:A televisionblendergeneratorelectric motor
An abacus is not a computer system as zero parts of the abacus are electrical. For the abacus to be a computer system, it has to have an input, output and process and store data. If even one of the following is not true then the device will not be considered a computer system. An abacus can not store data, as the human using the abacus will have to memorise the sequences instead of the abacus being able to memorise on its own.
An analog computer is any computer that represents its data in the form of continuously variable signals instead of the discontinuous encoded symbols used by digital computers.
Abacus was invented by the Chinesethe abacus was also known as the first computer
Wediki
abacus is an ancient calculating tools while an computer is a modern tools.
abacus old-fashioned cash register (with gears and handle) gear-driven clocks/watches ---- Actually the above are examples of mechanical computers, not analog computers. Analog computers use continually variable quantities. An abacus uses discrete units of measurement and is digital, though not binary. A slide rule is an example of a simple mechanical analog computer. Another example is the Norden Bomb Sight. An ancient example is the astrolabe. More complex analog computers are programmable and can use fluid, mechanical, or electronically set values. There is a link below to an article on analog computers.
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