Besides calculators and abacuses, what else do you think is needed!

Calculation chip, proportion gauge, Napier chip, slide rule, computer

Out of the computer and abacus, what other computing tools

Electronic calculator is the kind we usually use
Slide rule is rarely used now, but it is the main calculation tool when there is no computer. In China, it belongs to Polai product, which is divided into circular slide rule and straight slide rule
Scale gauge: Galileo invented the "scale gauge". It is shaped like a compass, with scales on each foot. It can be opened and closed at will. It is a tool for calculating the multiplication and division ratio by using the principle of proportion
Mechanical computer: mechanical computer and slide rule appear at the same time, it is a great invention of computing tools
I don't know anything else

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