What is another word for calculator of old?
Pronunciation: [kˈalkjʊlˌe͡ɪtəɹ ɒv ˈə͡ʊld] (IPA) 
The calculator of old was a device used for performing mathematical calculations. There are several synonyms for this device, such as abacus, slide rule, adding machine, and mechanical calculator. The abacus is a tool used for performing basic arithmetic calculations, commonly made of wood and beads. The slide rule is also a mechanical calculating device that can perform mathematical operations such as multiplication, division, and logarithms. The adding machine was commonly used for business-related calculations, capable of performing addition and subtraction. Finally, the mechanical calculator was a more advanced device that could perform complex calculations such as multiplication and division using gears and levers. Although these devices have been replaced by digital calculators, they were once essential tools for performing mathematical calculations.
