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  2. Slide rule - Wikipedia

    en.wikipedia.org/wiki/Slide_rule

    Engineer using a slide rule, with mechanical calculator in background, mid 20th century. A more modern form of slide rule was created in 1859 by French artillery lieutenant Amédée Mannheim, who was fortunate both in having his rule made by a firm of national reputation, and its adoption by the French Artillery. Mannheim's rule had two major ...

  3. Slide calculator - Wikipedia

    en.wikipedia.org/wiki/Slide_calculator

    A slide calculator, also known as an Addiator after the best-known brand, is a mechanical calculator capable of addition and subtraction, once made by Addiator Gesellschaft of Berlin, Germany. Variants of it were manufactured from 1920 until 1982. The devices were made obsolete by the electronic calculator.

  4. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Free Lossless Audio Codec [42] 4D 54 68 64: MThd: 0 mid midi MIDI sound file [43] D0 CF 11 E0 A1 B1 1A E1: ÐÏ␑ࡱ␚á: 0 doc xls ppt msi msg Compound File Binary Format, a container format defined by Microsoft COM. It can contain the equivalent of files and directories.

  5. Computer animation - Wikipedia

    en.wikipedia.org/wiki/Computer_animation

    An example of computer animation which is produced from the "motion capture" techniqueComputer animation is the process used for digitally generating moving images. The more general term computer-generated imagery (CGI) encompasses both still images and moving images, while computer animation only refers to moving images.

  6. Betty White - Wikipedia

    en.wikipedia.org/wiki/Betty_White

    Betty Marion Ludden (née White; January 17, 1922 – December 31, 2021) was an American actress and comedian. [1] [2] A pioneer of early television with a career spanning almost seven decades, she was noted for her vast number of television appearances, acting in sitcoms, sketch comedy, and game shows.

  7. Tree girth measurement - Wikipedia

    en.wikipedia.org/wiki/Tree_girth_measurement

    Photographs of trees can be used to determine girth or other measurements if there is a something of known size in the photo to provide a scale. The following information must be known to approximate the measurements: 1) distance of the camera from the tree, 2) distance from the camera to the scale, and 3) size of the object to be used as a scale.

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  9. Angular diameter - Wikipedia

    en.wikipedia.org/wiki/Angular_diameter

    The angular diameter, angular size, apparent diameter, or apparent size is an angular separation (in units of angle) describing how large a sphere or circle appears from a given point of view. In the vision sciences , it is called the visual angle , and in optics , it is the angular aperture (of a lens ).