A calculator is a small electronic device that you use for making mathematical calculations. a pocket calculator. Machine for performing arithmetic operations and certain mathematical functions automatically. Blaise Pascal devised a digital arithmetic machine in 1642. By the late 19th century, such machines had become smaller and easier to use, and desktop machines appeared in the early 20th century. Electronic data-processing systems in the mid-1950s led to the obsolescence of mechanical calculators. Miniature solid-state devices ushered in calculators that could perform mathematical functions in addition to basic arithmetic, and also store data and instructions in memory registers, providing programming capabilities similar to those of small computers
A device used for solving mathematical problems In a simple calculator by depressing keys on a keyboard, it is told to add, subtract, multiply, divide and clear the display Complex calculators can perform many scientific calculations
An application to perform standard arithmetical functions such as adding, subtracting, multiplying, dividing, and computing percentages