Calculator
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A calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics.
An electronic pocket calculator with a seven-segment liquid-crystal display (LCD) that can perform arithmetic operations
A modern scientific calculator with a dot-matrix display
Scientific calculator displays of fractions and decimal equivalents
The interior of a Casio FX-991s calculator
Scientific calculator
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A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic and advanced mathematical operations and functions. They have completely r
Calculator
…and they became common in schools. In addition to general-purpose calculators, there are those designed for specific markets. For example, there are scientific calculators, which include trigonometric and statistical calculations. Some calculators even have the ability to do computer algebra. Graphing calculators can be…
Casio fx-991DE X - a modern digital calculator from Casio with a dot matrix "Natural Textbook" LCD
Casio fx-77, a solar-powered digital calculator from the 1980s using a single-line LCD
HP-35, the world's first scientific pocket calculator, was introduced in 1972 by Hewlett-Packard. It used reverse Polish notation and an LED display.
TI SR-50