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  2. List of disk drive form factors - Wikipedia

    en.wikipedia.org/wiki/List_of_disk_drive_form...

    8-, 5.25-, 3.5-, 2.5-, 1.8- and 1-inch HDDs, together with a ruler to show the length of platters and read-write heads A newer 2.5-inch (63.5 mm) 6,495 MB HDD compared to an older 5.25-inch full-height 110 MB HDD. IBM's first hard drive, the IBM 350, used a stack of fifty 24-inch platters and was of a size comparable to two large refrigerators.

  3. Drive bay - Wikipedia

    en.wikipedia.org/wiki/Drive_bay

    They were 3 + 1 ⁄ 4 inches (82.6 mm) high, 5 + 3 ⁄ 4 inches (146.1 mm) wide, and up to 8 inches (203.2 mm) deep, used mainly for hard disk drives and floppy disk drives. This is the size of the internal (screwed) part of the bay, as the front side is actually 5 + 7 ⁄ 8 inches (149.2 mm). The difference between those widths and the name of ...

  4. .450/400 Nitro Express - Wikipedia

    en.wikipedia.org/wiki/.450/400_Nitro_Express

    The .450/400 Nitro Express is a Nitro Express rifle cartridge that is produced in three case lengths: 2 3 ⁄ 8-inches, 3 inches and 3 1 ⁄ 4-inches, [2] and is intended for use in single shot and double rifles. The 3-inch and 3 1 ⁄ 4-inch versions are considered classic Nitro Express cartridges.

  5. Aspect ratio (image) - Wikipedia

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

    A good example of this a 4×6 print (6 inch wide by 4 inch tall landscape) perfectly matches the 3:2 aspect ratio of a DSLR/35 mm, since 6/2=3 and 4/2=2. For analog projection of photographic slides, projector and screen use a 1:1 aspect ratio, supporting horizontal and vertical orientation equally well.

  6. Loading gauge - Wikipedia

    en.wikipedia.org/wiki/Loading_gauge

    For example, the Lyn locomotive of the Lynton and Barnstaple Railway is 7 feet 2 inches (2.18 m) wide. By comparison, several standard gauge 73 class locomotives of the NSWR, which are 9 feet 3 inches (2.82 m) wide, have been converted for use on 610 mm (2 ft) cane tramways, where there are no narrow bridges, tunnels or track centres to cause ...

  7. Human penis size - Wikipedia

    en.wikipedia.org/wiki/Human_penis_size

    The paper compared results of twelve studies conducted on different populations in several countries. Various methods of measurements were included in the review. [6] A 2015 study by BJU International concluded the average erect penis length to be 13.12 cm (5.16 inches). [2]

  8. 1:18 scale - Wikipedia

    en.wikipedia.org/wiki/1:18_scale

    1:18 scale is a traditional scale (ratio) for models and miniatures, in which 18 units (such as inches or centimeters) on the original is represented by one unit on the model. Depending on application, the scale is also called two third inch scale since 1 foot is represented by 2/3 of an inch.

  9. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    2.7 m – length of a leatherback sea turtle, the largest living turtle; 2.72 m – (8 feet 11 inches) – tallest-known human (Robert Wadlow) [31] 3 m – length of a giant Gippsland earthworm; 3 m – length of an Komodo dragon, the largest living lizard; 3.63 m – the record wingspan for living birds (a wandering albatross)