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2. Windows Calculator - Wikipedia

   en.wikipedia.org/wiki/Windows_Calculator

   A simple arithmetic calculator was first included with Windows 1.0. [5]In Windows 3.0, a scientific mode was added, which included exponents and roots, logarithms, factorial-based functions, trigonometry (supports radian, degree and gradians angles), base conversions (2, 8, 10, 16), logic operations, statistical functions such as single variable statistics and linear regression.

3. TI-59 / TI-58 - Wikipedia

   en.wikipedia.org/wiki/TI-59_/_TI-58

   The TI-59 is an early programmable calculator, that was manufactured by Texas Instruments from 1977. It is the successor to the TI SR-52, quadrupling the number of "program steps" of storage, and adding "ROM Program Modules" (an insertable ROM chip, capable of holding 5000 program steps).

4. Calculator - Wikipedia

   en.wikipedia.org/wiki/Calculator

   An electronic pocket calculator with a seven-segment liquid-crystal display ... It could add, multiply, subtract, and divide, and its output device was a paper tape.

5. Friden, Inc. - Wikipedia

   en.wikipedia.org/wiki/Friden,_Inc.

   Friden Calculator Friden Flexowriter. In 1957, Friden purchased the Commercial Controls Corporation of Rochester, New York.This gave them the Flexowriter teleprinter, an electric typewriter capable of being used as part of unit record equipment developed in World War II for the Department of the Navy to automatically type "regret to inform you" letters to the survivors of fallen servicemen ...

6. Programmable calculator - Wikipedia

   en.wikipedia.org/wiki/Programmable_calculator

   Also commonly available from many companies are small printers made specifically for calculators which tend to use cash register tape paper, ports and cables for connecting the calculators to a computer and/or another calculator, cassette recorders for recording programs and data, overhead projector displays, and connectors for auxiliary ...

7. HP-65 - Wikipedia

   en.wikipedia.org/wiki/HP-65

   HP-65 in original hard case with manuals, software "Standard Pac" of magnetic cards, soft leather case, and charger. The HP-65 is the first magnetic card-programmable handheld calculator.