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  2. Clock network - Wikipedia

    en.wikipedia.org/wiki/Clock_network

    A clock network or clock system is a set of synchronized clocks designed to always show exactly the same time by communicating with each other. Clock networks usually consist of a central master clock kept in sync with an official time source, and one or more slave clocks which receive and display the time from the master.

  3. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    Huygens first used a clock to calculate the equation of time (the difference between the apparent solar time and the time given by a clock), publishing his results in 1665. The relationship enabled astronomers to use the stars to measure sidereal time , which provided an accurate method for setting clocks.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  5. Category:Time measurement systems - Wikipedia

    en.wikipedia.org/wiki/Category:Time_measurement...

    This category lists systems by which the time of day and/or time intervals can be measured. Subcategories. ... Thai six-hour clock; Time line (basketball) Time server;

  6. 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

  7. Chronometry - Wikipedia

    en.wikipedia.org/wiki/Chronometry

    Time metrology or time and frequency metrology is the application of metrology for timekeeping, including frequency stability. [ 28 ] [ 29 ] Its main tasks are the realization of the second as the SI unit of measurement for time and the establishment of time standards and frequency standards as well as their dissemination .

  8. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    24-hour digital clock in Miaoli HSR station.. A time of day is written in the 24-hour notation in the form hh:mm (for example 01:23) or hh:mm:ss (for example, 01:23:45), where hh (00 to 23) is the number of full hours that have passed since midnight, mm (00 to 59) is the number of full minutes that have passed since the last full hour, and ss (00 to 59) is the number of seconds since the last ...

  9. Police identify Luigi Mangione as 'strong person of interest ...

    www.aol.com/man-questioned-penn-over-similar...

    A "strong person of interest" was arrested in Pennsylvania on Monday, after finding he had a fake ID with the same name as the one used by the suspected killer of UnitedHealthcare CEO Brian ...

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