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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.
- John Napier
Statue of John Napier, Scottish National Portrait Gallery....
- Nomogram
Also like a slide rule, its accuracy is limited by the...
- Vernier Scale
Slide rule – graphical analog calculator; Transversal...
- John Napier
Jun 7, 2023 · As always, the slide rule only has values from 1 to 10, so you'll need to write the number in scientific notation before you can find its square root. [8] Example 3: to solve √ (390), write it as √ (3.9 x 10 2 ). Example 4: to solve √ (7100), write it as √ (7.1 x 10 3 ). 2. Determine which side of the A scale to use.
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Mar 12, 2024 · The slide rule remained an essential tool in science and engineering and was widely used in business and industry until it was superseded by the portable electronic calculator late in the 20th century. The logarithmic slide rule is a compact device for rapidly performing calculations with limited accuracy. The invention of logarithms in 1614 by ...
- The Editors of Encyclopaedia Britannica
The HP-35 “Slide Rule Calculator” was first introduced in the mid-1970's,and sold for $295*. This calculator started the demise of the slide rule industry. *$3000 in today's money Prior to 1980, Webster's Dictionary defined the word “COMPUTER” as a PERSON who computes, typically with a slide rule.
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This is an example of a problem that can be solved more quickly on the slide rule than on a calculator. With practice many people find they are as fast or faster on a slide rule than they are on a calculator. Earlier I mentioned checking a slide rule for accuracy. I like to multiply 2 by a series of numbers, like 2, 2.5, 3, 3.5, 4, 4.5, and 5.
Learn about the history and variety of slide rules, the pre-eminent calculating tool from 1620 to 1980, and see examples of different makes, types and formats on display at the museum. Explore the history of calculators from the abacus to the digital, and see how they evolved from simple to complex devices.
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This is a minimal Slide Rule calculator with 8 functions (+,-,x,/,sqrt, pi,%,+/-) with memory, 24 keys and a VFD (vacuum fluorescent) display. The power source is 2xAA batteries. Panasonic is a division of Matsushita Electric Corporation. This is a nice compact version, and they produced over 250 calculator models from 1970 through 1986.
