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An electronic pocket calculator with a seven-segment liquid-crystal display (LCD) that can perform arithmetic operations. A modern scientific calculator with an LCD. An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics .
A graphing calculator (also graphics calculator or graphic display calculator) is a handheld computer that is capable of plotting graphs, solving simultaneous equations, and performing other tasks with variables.
The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz around 16 and completed in 1694. The name comes from the translation of the German term for its operating mechanism, Staffelwalze , meaning "stepped drum".
Students who need a scientific calculator should look no further than this Sharp 16-digit scientific calculator. Its most noticeable feature is a large, four-line screen that shows entered ...
On a single-step or immediate-execution calculator, the user presses a key for each operation, calculating all the intermediate results, before the final value is shown. On an expression or formula calculator, one types in an expression and then presses a key, such as "=" or "Enter", to evaluate the expression.
A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically, or (historically) a simulation such as an analog computer or a slide rule.