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Before the smartphone, the laptop and the graphing calculator, there was the slide rule. It's a powerful mechanical computing device, often no larger than a 12-inch ruler, marked with numbers...
Nov 12, 2008 · If you look at Webster’s Dictionary prior to 1970, the calculator was a slide rule, and the computer was the person who used the slide rule. A matter of fact, you’ll see a lot of slide rules that are marked proportional calculator or proportional computer.
It has thus been compared with reverse Polish notation (RPN) implemented in electronic calculators. A slide rule requires the user to separately compute the order of magnitude of the answer to position the decimal point in the results.
Before there were apps for tablets and smartphones, before mathematics education software was easily installed on personal computers, before electronic calculators entered professional practice and the classroom, Americans used slide rules to make calculations.
Jun 7, 2023 · But after you learn about it, you can see why the slide rule was so useful in the centuries before pocket calculators. Line up the right numbers on the scale, and you can multiply any two numbers together, with much less math than you would use with pencil and paper.
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calculation. slide rule, a device consisting of graduated scales capable of relative movement, by means of which simple calculations may be carried out mechanically. Typical slide rules contain scales for multiplying, dividing, and extracting square roots, and some also contain scales for calculating trigonometric functions and logarithms.
Sep 12, 2006 · Using a slide rule isn't like using an electronic calculator. You actually need to do an approximation of the calculation in your head, because the slide rule doesn't do powers of ten; you need...
