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  2. List of PTP implementations - Wikipedia

    en.wikipedia.org/wiki/List_of_PTP_implementations

    Antenna-integrated OTMC 100 PTP grandmaster clock from OMICRON Lab [55]; AVN-GMCS IEEE1588 PTP Grandmaster Clock with GPS Receiver from Sonifex [56]; Calnex Solutions provides a number of IEEE 1588v2 test products for field and factory use including Paragon-X, Paragon-100G and Sentinel [57]

  3. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    The equation of time was engraved on sundials so that clocks could be set using the Sun. In 1720, Joseph Williamson claimed to have invented a clock that showed solar time, fitted with a cam and differential gearing, so that the clock indicated true solar time. [137] [138] [139]

  4. Time clock - Wikipedia

    en.wikipedia.org/wiki/Time_clock

    Electronic time clock. A time clock, sometimes known as a clock card machine, punch clock, or time recorder, is a device that records start and end times for hourly employees (or those on flexi-time) at a place of business. In mechanical time clocks, this was accomplished by inserting a heavy paper card, called a time card

  5. Clock - Wikipedia

    en.wikipedia.org/wiki/Clock

    An analog pendulum clock made around 18th century. A clock or chronometer is a device that measures and displays time.The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month, and the year.

  6. Telechron - Wikipedia

    en.wikipedia.org/wiki/Telechron

    Telechron was an American company that manufactured electric clocks between 1912 and 1992. "Telechron" is derived from the Greek words tele, meaning "far off," and chronos, "time," thus referring to the transmission of time over long distances.

  7. Daylight saving time 2024: When do clocks fall back ... - AOL

    www.aol.com/daylight-saving-time-2024-clocks...

    When clocks reach 2 a.m. local time, they will go back one hour to 1 a.m. Many devices, such as phones and computers, will automatically change to standard time, but non-smart devices, such as ...

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