 Mechanical calculators

Mechanical calculators are devices used to perform mathematical calculations through mechanical means, rather than electronic or digital methods. They were developed before the advent of electronic calculators and typically used gears, levers, and other mechanical parts to execute arithmetic operations such as addition, subtraction, multiplication, and division. ### Key Features of Mechanical Calculators: 1. **Design and Operation**: Mechanical calculators often feature a series of keys or levers that the user manipulates to input numbers.