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  2. Slide rule - Wikipedia

    en.wikipedia.org/wiki/Slide_rule

    In 1677, Henry Coggeshall created a two-foot folding rule for timber measure, called the Coggeshall slide rule, expanding the slide rule's use beyond mathematical inquiry. In 1722, Warner introduced the two- and three-decade scales, and in 1755 Everard included an inverted scale; a slide rule containing all of these scales is usually known as a ...

  3. Fractal - Wikipedia

    en.wikipedia.org/wiki/Fractal

    [1] [4] [33] To elaborate, in trying to find the length of a wavy non-fractal curve, one could find straight segments of some measuring tool small enough to lay end to end over the waves, where the pieces could get small enough to be considered to conform to the curve in the normal manner of measuring with a tape measure. But in measuring an ...

  4. Floppy disk - Wikipedia

    en.wikipedia.org/wiki/Floppy_disk

    8-inch floppy disk, inserted in drive, (3½-inch floppy diskette, in front, shown for scale) 3½-inch, high-density floppy diskettes with adhesive labels affixed The first commercial floppy disks, developed in the late 1960s, were 8 inches (203.2 mm) in diameter; [4] [5] they became commercially available in 1971 as a component of IBM products and both drives and disks were then sold ...

  5. Surveying - Wikipedia

    en.wikipedia.org/wiki/Surveying

    Tape measures are often used for measurement of smaller distances. 3D scanners and various forms of aerial imagery are also used. The theodolite is an instrument for the measurement of angles. It uses two separate circles , protractors or alidades to measure angles in the horizontal and the vertical plane.

  6. Drive bay - Wikipedia

    en.wikipedia.org/wiki/Drive_bay

    8.0-inch drive bays were found in early IBM computers, CP/M computers, and the TRS-80 Model II.They were 4 + 5 ⁄ 8 inches (117.5 mm) high, 9 + 1 ⁄ 2 inches (241.3 mm) wide, and approximately 14 + 1 ⁄ 4 inches (361.9 mm) deep, and were used for hard disk drives and floppy disk drives.

  7. Measuring spoon - Wikipedia

    en.wikipedia.org/wiki/Measuring_spoon

    Metric measuring spoons, 1–125 ml Measuring Spoons, ⅛–1 tablespoon Micro scoops for measuring milligram units of compounds; 6–10 mg (black), 10–15 mg (red), 25–30 mg (yellow) A measuring spoon is a spoon used to measure an amount of an ingredient, either liquid or dry, when cooking. Measuring spoons may be made of plastic, metal ...

  8. Vertex distance - Wikipedia

    en.wikipedia.org/wiki/Vertex_distance

    A phoropter measurement of a patient reads −8.00 D sphere and −5.25 D cylinder with an axis of 85° for one eye (the notation for which is typically written as −8 −5.25×85).

  9. List of accidents and incidents involving airliners by location

    en.wikipedia.org/wiki/List_of_accidents_and...

    This list of accidents and incidents on airliners by location summarizes airline accidents by state location, airline company with flight number, date, and cause. It is also available grouped by year as List of accidents and incidents involving commercial aircraft; by airline;