Slide Rules Took Us to the Moon - Clickable Index Below

Sam Gillie explains why it is often said the slide rules took man to the moon and he also explains its critical role in saving the Apollo 13 Mission.
He simplifies the logarithm math that allows multiplication, square and cube root problems to be solved by adding and subtracting.
He tells his story about how the death of the slide rule by the first scientific calculators in the 70's impacted his last year in engineering school.
He shows his five slide rules he used, including a Pickett circular slide rule.
The talk includes a timeline on the transition from huge main frame computers, to Minicomputers, to desk top calculators, to handheld calculators and ending with free calculator Apps on our phones.
Sam Gillie is the current eaH Secretary and a Past President.

Clickable Index

00:24 Synopsys
01:14 Meeting Start
03:22 Humor
04:09 Introduction
04:56 President Kennedy Go to the Moon
06:13 The Tool That Took Us to the Moon
07:15 Basis Slide Rule Math
09:10 Math Shorthand Exponents
10:07 Multiple 2 x 4 by Adding
11:17 Express 2 and 4 as exponents
13:07 1 to 100 Log Table
14:28 Logarithms on the Slide Rule
15:25 Slide Rule Square Roots
17:06 Slide Rule Cube Roots
17:30 K & E - Keuffel & Esser Slide Rule
19:22 Significant Figures or Digits
21:36 My K & E Slide Rule and History
23:57 Slide Rule Collection
25:02 Pickett Circular Slide Rule
25:37 Micronta Bamboo Slide Rule
26:08 How the Slide Rule Took Us To the Moon
28:32 Calculators & Computers
28:57 Hidden Figures
29:31 HP Short History
30:46 Calculator Stories
33:51 Apollo 13
35:22 The Quiz
35:38 Meeting Close