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2. Calculator - Wikipedia

   en.wikipedia.org/wiki/Calculator

   Calculator functions are included in most smartphones, tablets, and personal digital assistant (PDA) type devices. 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.

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 and ...

4. These Calculators Make Quick Work of Standard Math ... - AOL

   www.aol.com/best-calculators-students...

   12C Financial Calculator. With more than 120 different built-in functions, such as amortization, cash flow, and loan payments, this HP financial calculator makes quick work of your accounting ...

5. Software calculator - Wikipedia

   en.wikipedia.org/wiki/Software_calculator

   Calculators can also take in arbitrary information ranging from lifestyle information to scientific notation. Some examples of these types of software calculators include: Love calculator: The input is two names, and there is a button to work out the compatibility, as a percentage, of two people with these names.

6. Mechanical calculator - Wikipedia

   en.wikipedia.org/wiki/Mechanical_calculator

   Friden made a calculator that also provided square roots, basically by doing division, but with added mechanism that automatically incremented the number in the keyboard in a systematic fashion. The last of the mechanical calculators were likely to have short-cut multiplication, and some ten-key, serial-entry types had decimal-point keys.

7. Comparison of Texas Instruments graphing calculators

   en.wikipedia.org/wiki/Comparison_of_Texas...

   A graphing calculator is a class of hand-held calculator that is capable of plotting graphs and solving complex functions. There are several companies that manufacture models of graphing calculators. Texas Instruments is a major manufacturer. The following table compares general and technical information for a selection of common and uncommon ...