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2. Scale ruler - Wikipedia

   en.wikipedia.org/wiki/Scale_ruler

   A scale ruler is a tool for measuring lengths and transferring measurements at a fixed ratio of length; two common examples are an architect's scale and engineer's scale. In scientific and engineering terminology, a device to measure linear distance and create proportional linear measurements is called a scale.

3. Fuller calculator - Wikipedia

   en.wikipedia.org/wiki/Fuller_calculator

   The calculator described above was called "Model No. 1" . [6] Model 2 had scales on the inner cylinder for calculating logs and sines.The "Fuller-Bakewell" model 3 had two scales of angles printed on the inner cylinder to calculate cosine² and sine ⋅ cosine [note 1] for use by engineers and surveyors for tacheometry calculations.

4. Slide rule - Wikipedia

   en.wikipedia.org/wiki/Slide_rule

   Some engineering students and engineers carried ten-inch slide rules in belt holsters, a common sight on campuses even into the mid-1970s. Until the advent of the pocket digital calculator, students also might keep a ten- or twenty-inch rule for precision work at home or the office [24] while carrying a five-inch pocket slide rule around with them.

5. Ruler - Wikipedia

   en.wikipedia.org/wiki/Ruler

   A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]

6. Sewing gauge - Wikipedia

   en.wikipedia.org/wiki/Sewing_gauge

   A 6" long sewing gauge with a plastic slider. A sewing gauge is a ruler, typically 6 inches long, used for measuring short spaces.It is typically a metal scale, marked in both inches and centimeters with a sliding pointer, similar in use to a caliper.

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