• Cycling did not appeal to the masses until the introduction of the pneumatic safety bicycle with a chain and sprocket drive (the prototype of the modern design).

    FORBES: A Comic Look At The 1890s Bicycle Boom

  • In the early 1990s its engineers figured out how to squeeze a digital soundtrack onto a piece of film without losing the analog soundtrack, by putting the digital track into the spaces between the sprocket holes on a piece of film.

    FORBES: Technology

  • In their bid to simplify loading 35mm film, Kodak, Fuji and other photographic firms squared off the 35mm roll's lead-in tab—so a modern SLR's motor-driven loading mechanism could grab the film's sprocket holes and wind it automatically onto the take-up spool.

    ECONOMIST: A die-hard analog photographer goes digital

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