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Evil Mad Scientist
Calculator Design
Mechanical Calculator
Adding Machine
Adding Fractions
Slide Rule
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Diy Cardboard
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Make your own 1952 fraction of an inch adding machine
Make your own 1952 Fraction-of-an-inch Adding Machine
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Make your own 1952 Fraction-of-an-inch Adding Machine
mathematics
The Appeal of Slide Rules - For Use and as Collectables.
Calculators!
Make Your Own Wallet-sized Enigma(tm)-like Machine
Fonts
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Escape room
Design: Wheels
CIRCULAR CD SLIDE RULE
Science, Math, Engineering & Technology!
Bank of England celebrates 325 years with 325 “curiosities”
gry
CIRCULAR CD SLIDE RULE
watch clocks
CARDBOARD SLIDE RULE
Mathematics
Make Your Own Wallet-sized Enigma(tm)-like Machine
science
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Enigma/Paper Enigma
Tricks and experiments