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Adder
R. C. Allen Adding Machine
American Adding and Listing Machine
Archimedes Model C Calculator
Arithmaurel
Baldwin Calculating Machine
Emile Bec Multiplication Table
Emile Bec Multiplication Table (image 2)
Bollée Calculating Machine
Brunsviga Calculating Machine
Brunsviga Calculating Machine (image 2)
Brunsviga Calculating Machine (image 3)
Brunsviga Dupla Calculator
Bunzel-Delton Calculator
Burkhardt Arithmometer
Burridges and Marsham Adding Machine
Burroughs Electric Duplex Calculator
Burroughs Hand Operated Adding-Subtracting Machine
Chateau Frères Calculating Machine
Circular Cardboard Calculator
Cole Military Sector
De Te We Model T Electric Calculating Machine
The Discomputer
Edmondson's Circular Calculating Machine
Equinoctial Sundial
Felt and Tarrant Comptometer
Gab-ka Adding Machine
Galileo Proportional Compass
Grant Calculating Machine
Gunner's Calipers
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