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Old fashioned slide rule isolated on black background.
IRS Income tax form 1955 tax table
group of old slide rule slipstick analogue computer for mathematical calcululs, close view
adding machine tape and blue caculator against blue and yellow background
Mental arithmetic Japanese abacus called soroban placed on printed practice calculations.
Add-lister receipts and calculator.
Armillary Sphere - Astrolabe Globe
Calculator and abacus on blank spiral notebook
A photo of a calculator and a pencil on an A4 notebook.
Time sheet on office wall
vintage punched card for computer data storage and programming
Keys of an aging keyboard of a calculator.
Gothenburg, Sweden - October 08 2023: Canon Palmtronic LC-8M pocket calculator on black background.
Property deeds in canvas binders from a government records center
Camera Dials and Controls on an antique 35mm rangefinder type camera.
Old page with multiplication table.
Old vintage pocket electronic calculator isolated on white background
Blue Calculator with pencil and paper
Chinese feng shui compass.Feng shui compass (Luopan).antique chinese compass for feng shui
Keys and digits of a used calculator.
selective focus, calculator or calculating machine on a white background, a tool for calculating from simple calculations
slide rules made of wood and plastic
Business cards indexed and organized alphabetically for communications and contacts or leads for sales to clients
Calculator and abacus on blank spiral notebook
Old vintage pocket electronic calculator isolated on black background
glasses and a pen on a book
Close-up view of antique calculator
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Number thirteen on a tailor's tape measure close up
Vintage adding machine.
Free Images: "bestof:...Dist em Calculator - MIT Slide Rule Collection - DSC03630.JPG en MIT Slide Rule Collection MIT Museum Cambridge Massachusetts USA The museum permitted"
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