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  2. List of floppy disk formats - Wikipedia

    en.wikipedia.org/wiki/List_of_floppy_disk_formats

    Size Density Sides Tracks tpi bpi Sectoring Coercivity Unformatted capacity per side 2 inch Video Floppy: 52 256 >800 kB or 50 fields of analog video [1] 2 inch LT-1: double 80 245 2 1 ⁄ 2 inch: Single 16 [2] [3] 48 [2] 64 kB 3 inch QuickDisk: 3.25 inch single 1 80 [4] 140 4,625 250 kB double 9,250 500 kB 3 1 ⁄ 2 inch: Single 2: 40 [5] 67.5 ...

  3. 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 ...

  4. Optimum HDTV viewing distance - Wikipedia

    en.wikipedia.org/wiki/Optimum_HDTV_viewing_distance

    A 1997 study, which hypothesized that increases in screen size would give rise to increased feelings of presence, found that the content was more important than the screen size. The findings were that for commercials , action-adventure and reality programming an increase in the feeling of presence did correlate with increased size.

  5. Apostrophe - Wikipedia

    en.wikipedia.org/wiki/Apostrophe

    Introduced by Geoffroy Tory (1529), [5] the apostrophe was used in place of a vowel letter to indicate elision (as in l'heure in place of la heure).It was also frequently used in place of a final "e" (which was still pronounced at the time) when it was elided before a vowel, as in un' heure.

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