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  2. Doomsday Clock - Wikipedia

    en.wikipedia.org/wiki/Doomsday_Clock

    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.

  3. History of timekeeping devices - Wikipedia

    en.wikipedia.org/wiki/History_of_timekeeping_devices

    The Shortt–Synchronome clock, an electrical driven pendulum clock designed in 1921, was the first clock to be a more accurate timekeeper than the Earth itself. [167] A succession of innovations and discoveries led to the invention of the modern quartz timer. The vacuum tube oscillator was invented in 1912. [168]

  4. Benjamin Vulliamy - Wikipedia

    en.wikipedia.org/wiki/Benjamin_Vulliamy

    Benjamin Vulliamy (1747 – 31 December 1811), was a British clockmaker responsible for building the Regulator Clock, which, between 1780 and 1884, was the main timekeeper of the King's Observatory Kew and the official regulator of time in London. [2] In 1773 Vulliamy had received a Royal Appointment as the King's Clockmaker.

  5. Clock of the Long Now - Wikipedia

    en.wikipedia.org/wiki/Clock_of_the_Long_Now

    The Clock of the Long Now, also called the 10,000-year clock, is a mechanical clock under construction that is designed to keep time for 10,000 years. It is being built by the Long Now Foundation. A two-meter prototype is on display at the Science Museum in London. As of June 2018, two more prototypes are on display at The Long Now Museum ...

  6. 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.

  7. National Watch and Clock Museum - Wikipedia

    en.wikipedia.org/wiki/National_Watch_and_Clock...

    The National Watch and Clock Museum was founded in 1977 by the NAWCC and over time has put together a major collection of horological artifacts, mainly clocks and watches, but also related tools, machinery and ephemera, and has become an important institution in its field. Most of the greatest and most important clocks and watches ever made ...

  8. Clock synchronization - Wikipedia

    en.wikipedia.org/wiki/Clock_synchronization

    Clock synchronization. Clock synchronization is a topic in computer science and engineering that aims to coordinate otherwise independent clocks. Even when initially set accurately, real clocks will differ after some amount of time due to clock drift, caused by clocks counting time at slightly different rates.

  9. Daylight saving time - Wikipedia

    en.wikipedia.org/wiki/Daylight_saving_time

    Daylight saving time ( DST ), also referred to as daylight saving (s), daylight savings time, daylight time (United States and Canada), or summer time ( United Kingdom, European Union, and others), is the practice of advancing clocks to make better use of the longer daylight available during summer so that darkness falls at a later clock time.

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