I put in order my desk drawer and found this is what:
Then I found it in Internet - http://terni.ru/slide_rule
Alex Sokolov написал(а):
Adorable!
But the Japanese minimalism:
Самая маленькая логарифмическая линейка
В начале 60-х годов японец Тадао Икегао изготовил логарифмическую линейку длиной 22 мм. Несмотря на микроскопические размеры, на ней можно производить все математические расчеты, которые только возможны на логарифмических линейках.
The smallest slide rule
In the early 60s the Japanese Tadao Ikegao made the slide rule length of 22 mm. Despite the tiny size, it is possible to produce all the mathematical calculations that are only possible on the slide rule.
Philip Oakley написал(а):
The 'Japanese' slide rule looks very much like the http://www.scientificamerican.com/media/pdf/Slide_rule.pdf 'make it yourself' paper slide rule. It's quite nice with a moderate weight paper. Made a few my self very recently.
Not only a paper slide rule - a paper computer too
See please Компьютер из бумаги? ЛЕГКО!!!!! - YouTube
Or this origami:
Hello everyone!
I, in my drawer ... I have a Nestler, HP55, HP41, HP 65 SX, ... out of a drawer ... HP Vectra 486 33T ... ect (1024x646).jpg)
One scene from the Soviet comedy film "Самогонщики - Bootleggers"
One character ("Балбес") calculates with a slide rule how many sugar from the bag add in need, to get a good самогон (hand made vodka).
See pls Самогонщики HD1080p - YouTube. This film is without words. Only fine music...
A slide rule in one more soviet movie "Once Again About Love" - about Love to... a slide rule 
I just figured out what this is:
I've had it for years, but never knew what it was. Just some "weird ruler". It's called a Gunter's rule, or Gunter's scale. It was a precursor to the slide rule. There's more about how it was used here:
http://www.nzeldes.com/HOC/Gunter.htm
There are some other examples here:
http://www.sliderulemuseum.com/Rarities.htm
Based on the examples shown, mine is from the early 1800's. Note in particular the style of the numbering, and the fact that the 12 inch scale on the top of side 1 runs from right to left, rather than left to right.
There's a higher resolution image in the attachment.
Yesterday I visited a laundry. A receptionist (one old women) weighed my linen on some balances (one picture from Internet):
and calculated the price with this "computer":
You can see the result on the "screen" (It is my photo) - 531 rubles and 48 kopeks (1$=80 Ruble).
At home I have checked it (Mathcad Prime 3.1).
I was surprised at first, but then I thought that all of this (and the phone) will work after... a nuclear war
From Wikipedia
Russian abacus
The Russian abacus, the schoty (счёты), usually has a single slanted deck, with ten beads on each wire (except one wire, usually positioned near the user, with four beads for quarter-ruble fractions). Older models have another 4-bead wire for quarter-kopeks, which were minted until 1916. The Russian abacus is often used vertically, with wires from left to right in the manner of a book. The wires are usually bowed to bulge upward in the center, to keep the beads pinned to either of the two sides. It is cleared when all the beads are moved to the right. During manipulation, beads are moved to the left. For easy viewing, the middle 2 beads on each wire (the 5th and 6th bead) usually are of a different colour from the other eight beads. Likewise, the left bead of the thousands wire (and the million wire, if present) may have a different color.
As a simple, cheap and reliable device, the Russian abacus was in use in all shops and markets throughout the former Soviet Union, and the usage of it was taught in most schools until the 1990s.[42][43] Even the 1874 invention of mechanical calculator, Odhner arithmometer, had not replaced them in Russia and likewise the mass production of Felix arithmometers since 1924 did not significantly reduce their use in the Soviet Union.[44] The Russian abacus began to lose popularity only after the mass production of microcalculators had started in the Soviet Union in 1974. Today it is regarded as an archaism and replaced by the handheld calculator.
... or Mathcad Prime/Gateway developer!
In Russia, the slide rule called a logarithmic rule. But we can not calculate with this device ... logarithm or 10^x. Or I'm wrong?
One solution of one student
It is for Mathcad Mad House - Маткадовский дурдом
Lawrence Lederer написал(а):
No sure if the slide rule split his head in two or he is making it part of his brain.
It is a double slide rule - I never seen someone!
I was able to solve differential equations on such device (Robotron?) in my student years. If you divide by zero, the carriage of this device goes from left to right - to the stop and there chirped until it laboratory assistant stopped.
