Calculator

The calculator is a computing machine. Its purpose is to do mathematics; basic calculators do the basic mathematical functions (addition, subtraction, division, and multiplication) while the more advanced ones, which are relatively new in the history of computing machines, do advanced calculations such as solving polynomials. The odometer, or mileage counter, in your car is a counting machine as is the calculator in your backpack and the computer on your desk. They may have different ability levels, but they all tally numbers.