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  2. Time clock - Wikipedia

    en.wikipedia.org/wiki/Time_clock

    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, into a slot on the time clock.

  3. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    History of timekeeping devices. A marine sandglass. It is related to the hourglass, nowadays often used symbolically to represent the concept of time. The history of timekeeping devices dates back to when ancient civilizations first observed astronomical bodies as they moved across the sky. Devices and methods for keeping time have gradually ...

  4. Doomsday Clock - Wikipedia

    en.wikipedia.org/wiki/Doomsday_Clock

    The Doomsday Clock is a symbol that represents the likelihood of a human-made global catastrophe, in the opinion of the members of the Bulletin of the Atomic Scientists. [1] Maintained since 1947, the Clock is a metaphor, not a prediction, for threats to humanity from unchecked scientific and technological advances. That is, the time on the ...

  5. Timeline of time measurement inventions - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_time...

    1676 - Daniel Quare, a London clock-maker, invents the repeating clock, that chimes the number of hours (or even minutes). [ 7] 1680 - Second hand introduced. 1737 - John Harrison presents the first stable marine chronometer, thereby allowing for precise longitude determination while at sea. 1850 - Aaron Lufkin Dennison starts in Roxbury, Mass ...

  6. Clock - Wikipedia

    en.wikipedia.org/wiki/Clock

    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. Devices operating on several physical processes have been used over the millennia.

  7. History of time in the United States - Wikipedia

    en.wikipedia.org/wiki/History_of_time_in_the...

    The history of standard time in the United States began November 18, 1883, when United States and Canadian railroads instituted standard time in time zones. Before then, time of day was a local matter, and most cities and towns used some form of local solar time, maintained by some well-known clock (for example, on a church steeple or in a ...

  8. Bundy Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Bundy_Manufacturing_Company

    The Bundy Manufacturing Company was a 19th-century American manufacturer of timekeeping devices that went through a series of mergers, eventually becoming part of International Business Machines and Simplex Time Recorder Company. It was the first time-recording company in the world to produce time clocks, colloquially known as 'Bundys'.

  9. Chronometry - Wikipedia

    en.wikipedia.org/wiki/Chronometry

    Clocks; a watch-maker seated at his workbench. Chronometry[a] or horology[b] (lit. 'the study of time') is the science studying the measurement of time and timekeeping. [3] Chronometry enables the establishment of standard measurements of time, which have applications in a broad range of social and scientific areas.

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