@neauoire oh! i’ll see what i’ve got in my analogue cyberpunk tag

aperture cards: punch cards with a microfische in the middle- the punches are used for indexing and retrieval of the content on the film.

https://imgur.com/gallery/I7wFi

@neauoire MONIAC is a water based computer that models the world economy as a set of columns of water and differential pressure systems stablizing at a equilibrium pressure.

Terry Pratchet based a discworld book on it.

http://nautil.us/blog/this-early-computer-was-based-on-a-urinal-flush-mechanism

https://hplusmagazine.com/2013/05/10/gardens-as-crypto-water-computers/

@neauoire The wikipedia article only says "ancient india" and doesn't say how far back it could go.

but, the vedic game known to us as "Snakes and Ladders" is structurally equivalent to a finite state machine, so you could, in principle, implement regular expressions and program language parsers as games of snakes and ladders.

@neauoire an aperiodic tile pattern in a 12th century islamic temple, using "girih" tiles, was found to be mathematically equivalent to the penrose tiling. I could go on for hours on this topic, but to relate it to THIS One, Roger Penrose used this aperiodic tiling in a mathematical proof that computers can't replicate human intelligence.

https://www.nature.com/news/2007/070219/full/news070219-9.html

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@neauoire Spiders offload some cognitive tasks and memories into the design of their webs.

https://www.quantamagazine.org/the-thoughts-of-a-spiderweb-20170523/

@neauoire And even though, as a sailor, you very likely know aaaaalll about these, I figure I should add these because it turns out my analog cyberpunk tag was empty, and I've been building this list up from memory.

1. Antikythera Mechanism

2. Sextant

3. Astrolabe

4. John Harrison's H4 Marine chronometer, the world's first clock accurate enough for longitudinal position calculation.

@neauoire a bit more mundanely, I used to use a proportion wheel back when I was studying to become a printer.

real growth industry that one. That career move really panned out.

@neauoire these tracks and carousel of pins implement the timing and sequence program and selection memory of a wurlitzer jukebox. pressing a buttton to select a record pushes a cooresponding pin up. as the drum spins, a metal brush arm closes a circuit with the 5 tracks to switch on and off the robotics motors at appropriate moments, and the selection pins stop the drum spinning at a soecific point in the cycle.

it’s explained in detail here https://youtu.be/o1qRzKuskK0

@neauoire paper tape being read at 2400 baud

@neauoire You know about antilog tables, I presume?

@zens yeah I think so, that's just multiplication tables right?

@neauoire Not exactly no. It was these thick books ships navigators used to bring along, along with a confusingly named companion "log table book".

the idea is you could do multiplication very quickly by taking your two input numbers, finding the corresponding logs, ADDING those together, and then finding the antilog of the result.

similarly division could be accomplished with subtraction.

errors in these books is what motivated babbage to try and invent a computer machine.

@zens Oh wow, like a dictionary of multiplication tables!

there was a whole field of human computers whose job it was to compute by hand the figures in these books.

@neauoire the principle of the sliderule was essentially the same.

If you take a ruler and space the numbers apart according to a logorithmic progression, you can sorta offset the two halves by some amount and get a dynamic multiplation/division calculation.

@neauoire

Hangman comes to mind.

For some reason I can't think of any others.

@neauoire @dozens @zens

did you have this one already https://en.m.wikipedia.org/wiki/Dots_and_Boxes

https://web.archive.org/web/20110809065316/http://orion.math.iastate.edu/danwell/MathNight/ppg.html

@neauoire i just remembered a similar trchnoque for computing percentages- e.g. numbers between 0-1 multiplied by each other.

where you kinda draw two rectangles in w box and the area they overlap is the answer.

@neauoire

@neauoire the Curta hand crank calculator

https://en.wikipedia.org/wiki/Curta

it does multipiclation by repeated addition!

YHANCI~1.TXT@yhancik@octodon.social@zens Zens you've been killing it with these links, so good! @neauoire