Found https://photocalcul.com/Bibliographie/jouanneau3.jpg in a public neighbor-book-box

Gonna have some help learning how to slide-rule

https://photocalcul.com/Bibliographie/livres_francais.html

The #SlideRule, like the #LogBook, is probably as useless as the #PocketCalculator, today. But I am obsessed with those relics, even in the face of modern 64-bit and 128-bit CPUs.

I hope, in a couple of decades when I'm six-feet-under, people still appreciate those CPUs as we do the slide rule.

Lo encontré en una tienda de segunda mano. Resulta difícil creer que la gente usara este aparato para hacer cálculos reales y hacer volar aviones. #regladecalculo #SlideRule #computoanalogico

After looking for a long time, I finally found this #Sliderule, which belonged to my late father. Some of you will know that these #devices were used, before the advent of digital #Calculators, to perform #arithmetic operations such as #multiplication and #division to about three significant figures, by #scientists and #engineers.

#Mathematics #Computation (1/2)

Found in a thrift store. Hard to believe that people used to use this actual thing to do actual calculations to fly actual planes. #SlideRule #AnalogComputer #aviation

Slide rules are fun, but I really like pocket rules. I recently added a Dietzgen 1776 and an UTO 601 Reitz. Most of my rules are Picketts, so these are a nice addition to the collection.

So, for fun, here are ten of my fourteen pocket rules. No more would fit!

- Aristo 867U, KL-1, Aristo 868
- Pickett 600, 1006, 100 "Douglas Sky Rule"
- Dietzgen 1776, UTO 601 Reitz
- Pickett 700, 200

Not pictured are Pickett N200T, 300, 400, N700T, nor my full-size and circular rules.

Best #pocket #calculator I own. Needs no batteries. #sliderule #analog #rechenschieber #rechenstab #taschenrechner

Just as an introductory post, here are a few interesting slide rules from my collection... #sliderule #sliderules