Calculator Algorithms

[SlideRule]

An excerpt from Engineer's Notebook, ELECTRONICS, v7 i7, 4 APR 1974, pgs. 142-146

Calculator algorithms
While you're saving up for that more expensive electronic slide rule, try updating your four-function electronic calculator. In this Engineer's notebook, you'll find a collection of algorithms that extend the computing power of your pocket calculator considerably. Although calculator algorithms are frequently not really brand new, don't forget that a new look at an old equation can save you many keystrokes or even a trip to your library shelf for those time-consuming lookup tables.

pg. 142 Evaluating e^x with constants
pg. 142 Chain operation for finding e^x
pg. 143 Counting keystrokes to get results
pg. 143 Evaluating logarithms by counting keystrokes
pg. 144 Another way to compute e^x
pg. 144 Computing sine & cosine with linear interpolation
pg. 145 Polynomial evaluations can be fast and accurate
pg. 146 Fast number conversion from any base to base-10
pg. 145 Calendar computations: past, present, and future

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[Jonathan Busby]

Thanks! Very interesting material -- I have vintage, mint condition four-bangers; perhaps I'll try some of the techniques on them I also wonder if they can be applied to a Suanpan abacus...

Oh, here's the PDF download link : https://archive.org/download/bitsavers_E...740404.pdf

I'll have some fun reading this on my Kindle

Regards,

Jonathan