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  2. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    Horizontal pitch (HP) is a unit of length defined by the Eurocard printed circuit board standard used to measure the horizontal width of rack mounted electronic equipment, similar to the rack unit (U) used to measure vertical heights of rack mounted equipment. One HP is 0.2 inches (1/5") or 5.08 millimetres wide.

  3. Aspect ratio (image) - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio_(image)

    The universal standard (established by William Dickson and Thomas Edison in 1892) is a frame that is four perforations high. The film itself is 35 mm wide (1.38 in), but the area between the perforations is 24.89 mm × 18.67 mm (0.980 in × 0.735 in), leaving the de facto ratio of 1.33:1.

  4. Academy ratio - Wikipedia

    en.wikipedia.org/wiki/Academy_ratio

    Academy ratio 1.375:1. The Academy ratio of 1.375:1 (abbreviated as 1.37:1) is an aspect ratio of a frame of 35 mm film when used with 4-perf pulldown. [1] [2] It was standardized by the Academy of Motion Picture Arts and Sciences as the standard film aspect ratio in 1932, although similar-sized ratios were used as early as 1928.

  5. Great Pyramid of Giza - Wikipedia

    en.wikipedia.org/wiki/Great_Pyramid_of_Giza

    They face each other and are located approximately 0.91 m (3.0 ft) above the floor, 2.5 m (8.2 ft) from the eastern wall, with a width of 18 and 21 cm (7.1 and 8.3 in) and a height of 14 cm (5.5 in). Both start out horizontally for the length of the granite blocks they go through before changing to an upwards direction.

  6. 7-Eleven - Wikipedia

    en.wikipedia.org/wiki/7-Eleven

    7-Eleven, Inc. [2] is an American convenience store chain, headquartered in Irving, Texas.The chain was founded in 1927 as the Southland Ice Company, operating an ice house storefront in Dallas.

  7. Diphthong - Wikipedia

    en.wikipedia.org/wiki/Diphthong

    American English pronunciation of "no highway cowboys" /noʊ ˈhaɪweɪ ˈkaʊbɔɪz/, showing five diphthongs: / oʊ, aɪ, eɪ, aʊ, ɔɪ / A diphthong (/ ˈ d ɪ f θ ɒ ŋ, ˈ d ɪ p-/ DIF-thong, DIP-; [1] from Ancient Greek δίφθογγος (díphthongos) 'two sounds', from δίς (dís) 'twice' and φθόγγος (phthóngos) 'sound'), also known as a gliding vowel or a vowel glide, is ...

  8. Scientific notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_notation

    It may be referred to as scientific form or standard index form, or standard form in the United Kingdom. This base ten notation is commonly used by scientists, mathematicians, and engineers, in part because it can simplify certain arithmetic operations .

  9. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    The ISO 216 standard, which includes the commonly used A4 size, is the international standard for paper size. It is used across the world except in North America and parts of Central and South America, where North American paper sizes such as "Letter" and "Legal" are used. [1] The international standard for envelopes is the C series of ISO 269.