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2. Slide rule - Wikipedia

   en.wikipedia.org/wiki/Slide_rule

   Typical ten-inch (25 cm) student slide rule (Pickett N902-T simplex trig) A slide rule is a hand-operated mechanical calculator consisting of slidable rulers for evaluating mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry. It is one of the simplest analog computers. [1] [2]

3. Fuller calculator - Wikipedia

   en.wikipedia.org/wiki/Fuller_calculator

   As with other slide rules, the Fuller is limited to calculations based on multiplication and division with additional scales allowing for trigonometical and exponential functions. The mechanical calculators produced in the same era were generally restricted to addition and subtraction with only advanced versions, like the Arithmometer , able to ...

4. Slide rule scale - Wikipedia

   en.wikipedia.org/wiki/Slide_rule_scale

   A slide rule scale is a line with graduated markings inscribed along the length of a slide rule used for mathematical calculations. The earliest such device had a single logarithmic scale for performing multiplication and division, but soon an improved technique was developed which involved two such scales sliding alongside each other.

5. E6B - Wikipedia

   en.wikipedia.org/wiki/E6B

   The other side is a circular slide rule. Extra marks and windows facilitate calculations specifically needed in aviation. Electronic versions are also produced, resembling calculators, rather than manual slide rules. Aviation remains one of the few places that the slide rule is still in widespread use. Manual E6-Bs/CRP-1s remain popular with ...

6. Mechanical calculator - Wikipedia

   en.wikipedia.org/wiki/Mechanical_calculator

   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. Most mechanical calculators were comparable in size to small desktop computers and have been rendered obsolete by the advent of the ...

7. Slide calculator - Wikipedia

   en.wikipedia.org/wiki/Slide_calculator

   A slide calculator, also known as an Addiator after the best-known brand, is a mechanical calculator capable of addition and subtraction, once made by Addiator Gesellschaft of Berlin, Germany. Variants of it were manufactured from 1920 until 1982. The devices were made obsolete by the electronic calculator.

8. Coggeshall slide rule - Wikipedia

   en.wikipedia.org/wiki/Coggeshall_slide_rule

   In measurement, the Coggeshall slide rule, also called a carpenter's slide rule, was a slide rule designed by Henry Coggeshall in 1677 to help in measuring the dimensions, surface area, and volume of timber. With his original design and later improvements, Coggeshall's slide rule brought the tool its first practical use outside of mathematical ...

9. Analog computer - Wikipedia

   en.wikipedia.org/wiki/Analog_computer

   The planimeter was a manual instrument to calculate the area of a closed figure by tracing over it with a mechanical linkage. A slide rule. The sliding central slip is set to 1.3, the cursor to 2.0 and points to the multiplied result of 2.6. The slide rule was invented around 1620–1630, shortly after the publication of the concept of the ...