# Mechanical calculator

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Curta calculator (my parents use one)

Early mechanical calculator

Curta Mechanical Calculator, a small, hand-cranked mechanical calculator introduced by Curt Herzstark in 1948. It can be used to perform addition, subtraction, multiplication, division, and (with more difficulty) square roots and other operations. considered the best portable calculators available until they were displaced by electronic calculators in the 1970s.

A vintage Facit mechanical calculator spins wildly while it tries to divide by zero in a video posted by MultiGlizda. Dividing a number by zero gives an undefined result, so the machine is i…

Vintage Mechanical Calculator RTS Zagreb Calculating Machine From 1960's by VintageshopSerbia on Etsy

Mechanical Calculator,Zero,Funny Memes,Architecture,Shower,Vintage,School,Design,Awesome

800px-Mechanical-calculator-Brunsviga-15-01.jpg (800×533)

vintage calculator / retro mechanical calculator / by BOULOTDODO

A mechanical calculator made in Switzerland. Used by car rallyists back in the day.

Replica of mechanical calculator invented by Leonardo Da Vinci | History of the Computer.

Mechanical Calculators

Calculators - The Difference 18 Years Makes http://knowtechie.com/calculators/

vintage mechanical calculators

Friden Model STW-10 Electro-Mechanical Calculator... I used one of these on my first job.

Dark Roasted Blend: Stunningly Intricate: Curta Mechanical Calculator

Curta mechanical calculators. I'm reading William Gibson's "Pattern Recognition", and these show up.