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2. Calculator - Wikipedia

   en.wikipedia.org/wiki/Calculator

   Calculator. 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 .

3. Scientific calculator - Wikipedia

   en.wikipedia.org/wiki/Scientific_calculator

   A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic ( addition, subtraction, multiplication, division) and complex ( trigonometric, hyperbolic, etc.) mathematical operations and functions. They have completely replaced slide rules as well as books of mathematical tables ...

4. Graphing calculator - Wikipedia

   en.wikipedia.org/wiki/Graphing_calculator

   A typical graphing calculator by Texas Instruments. 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. Most popular graphing calculators are programmable calculators, allowing the user ...

5. Software calculator - Wikipedia

   en.wikipedia.org/wiki/Software_calculator

   There is now a very wide range of software calculators, and searching the Internet produces very large numbers of programs that are called calculators.. The results include numerical calculators that apply arithmetic operations or mathematical functions to numbers, and that produce numerical results or graphs of numerical functions, plus some non-numerical tools and games that are also called ...

6. Calculator input methods - Wikipedia

   en.wikipedia.org/wiki/Calculator_input_methods

   Calculator input methods. There are various ways in which calculators interpret keystrokes. These can be categorized into two main types: 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. [1] [2] [3]

7. Formula calculator - Wikipedia

   en.wikipedia.org/wiki/Formula_calculator

   The formula is entered first, and requires operator precedence — multiplications and divisions precede additions and subtractions. A formula calculator is a software calculator that can perform a calculation in two steps: Enter the calculation by typing it in from the keyboard. Press a single button or key to see the final result.