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  2. Calculator watch - Wikipedia

    en.wikipedia.org/wiki/Calculator_watch

    The μWatch, an open-source DIY scientific calculator watch Casio CMD-40 calculator watch with built-in remote control The Casio TC500 touch sensor calculator watch from 1983. It uses a capacitive touch screen for the calculator and function buttons. A calculator watch is a digital watch with a built-in calculator, usually including buttons on ...

  3. HP-01 - Wikipedia

    en.wikipedia.org/wiki/HP-01

    The Hewlett-Packard HP-01 is a calculator watch. It was designed and manufactured by Hewlett-Packard (HP). The HP-01 used 7 light-emitting diodes (LEDs)/digit in a 7 digit + decimal point arrangement for its digital display. Introduced in 1977 at the height of the LED watch craze, five models were available, two gold filled models and three ...

  4. Casio CA-53W - Wikipedia

    en.wikipedia.org/wiki/Casio_CA-53W

    The Casio CA-53W is a digital calculator watch manufactured by the Japanese electronics company Casio and was introduced in 1988 [1] as a successor to the CA-50. It became famous for its appearance in the American science fiction films Back to the Future Part II (1989) and Back to the Future Part III (1990) [2] and later for appearing in the American TV series Breaking Bad (2008–2013).

  5. Apple Watch user discovers easy way to calculate tip with ...

    www.aol.com/apple-watch-user-discovers-easy...

    Recently, TikTok user Chloe Lyn discovered a feature on the Calculator app that takes all of the guessing work (and math) out of figuring out how much to tip.all you have to do is type in the ...

  6. Casio Databank - Wikipedia

    en.wikipedia.org/wiki/Casio_Databank

    Casio C-80 is the first calculator watch to be ever produced. The Databank CD-40 and CD-401 are the first Databank watches, debuting in 1983. It is one of the first digital watches developed in the 1980s that allows the user to store information, following a Pulsar model released in 1982.

  7. Oxygen saturation - Wikipedia

    en.wikipedia.org/wiki/Oxygen_saturation

    Dissolved oxygen levels required by various species in the Chesapeake Bay (US). In aquatic environments, oxygen saturation is a ratio of the concentration of "dissolved oxygen" (DO, O 2), to the maximum amount of oxygen that will dissolve in that water body, at the temperature and pressure which constitute stable equilibrium conditions.