A slide rule, dial caliper and pencil were the pre-computer tools of the trade for many engineers.

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A slide rule, dial caliper and pencil were the pre-computer tools of the trade for many engineers. Modern computers have made the slide rule relatively inaccurate and obsolete, but the mechanical dial caliper and pencil still live on.

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Size: 5616px × 3744px
Location: Studio photo,. Blue River, Oregon (USA)
Photo credit: © Robert Ruth / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: build, caliper, calliper, computation, dial, divide, engineer, engineering, exact, exponent, extrapolate, figure, graphite, log, logarithm, math, mathematics, measure, multiply, pencil, rule, slide, tool, tools, vintage