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Vintage logarithm ruler close up isolated on a white background
slide rules made of wood and plastic
Compilation of several slide rules, analog calculators, and measurement devices
Close up detail of a log/log slide rule isolated on a black background.
Slide rule, close up
Macro image of old scratched slide rule - an old mathematical tool for calculations from before the era of electronic calculators.
A Vintage Nostalgic Mathematics Calculating Slide Rule.
Money, as a medium of economic exchange in which prices and values are expressed. It is in every aspect of our daily life.
slide rule on a green background
Money and calculator
A slide rule with white background, for mathematical calculations
Ruler
old slide rule slipstick analogue computer for mathematical calcululs, top view
Calculator on american dollars
old vintage slide rule on white, isolated
View of the wooden ruler and the millimeter and centimeter scales with red and black numbers. A measuring instrument for craftsmen and do-it-yourselfers
Logarithmic ruler on white background. Stationery for engineers and students
Money and calculator
Plastic instrument for measuring linear dimensions in approximation
Carpenter's old ruler
A photo of a mathematics protractor on top of a black calculator on a white desk.
United States dollars and a calculator showing 1,000,000.
ancient wooden ruler on white, isolated
Blue Calculator with pencil and paper
Logarithmic ruler, pencil on a wooden table. Stationery for engineers and students
close-up of bi-colored slide rule scales.
image of a measuring stick
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numbers are the daily bread of people who work in the financial sector
Studio shot horizontal.
Free Images: "bestof:Net Price Calculator - MIT Slide Rule Collection - DSC03619.JPG en MIT Slide Rule Collection MIT Museum Cambridge Massachusetts USA The museum permitted"
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