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2. Clock network - Wikipedia

   en.wikipedia.org/wiki/Clock_network

   Diagram of electric time system used around 1910 to keep time in factories, schools, and other large institutions. The master clock, controlled by a temperature-compensated mercury pendulum, is wired to slave clocks throughout the building. In addition to wall clocks, it also controls time stamps that are used to stamp documents with the time ...

3. Slave clock - Wikipedia

   en.wikipedia.org/wiki/Slave_clock

   In addition to wall clocks, it also controls time stamps that are used to stamp documents with the time, and a turret clock used in a clock tower. The "program clock" is a timer that can be programmed with punched paper tape to ring bells or turn machines on and off at preprogrammed times. In telecommunication and horology, a slave clock is a ...

4. Digital clock - Wikipedia

   en.wikipedia.org/wiki/Digital_clock

   Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time. Most digital clocks display the hour of the day in 24-hour format; in the United States and a few other countries, a commonly used hour sequence option is 12-hour format (with some indication of AM or PM).

5. Shop the latest Trends and Deals - AOL.com

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   Let our guides and reviews save you time and money on a variety of things like digital picture frames, smart speakers or the latest in tech such as OTC hearing aids.Our experts and editors deliver ...

6. Clock - Wikipedia

   en.wikipedia.org/wiki/Clock

   Some clocks, usually digital ones, include an optical projector that shines a magnified image of the time display onto a screen or onto a surface such as an indoor ceiling or wall. The digits are large enough to be easily read, without using glasses, by persons with moderately imperfect vision, so the clocks are convenient for use in their ...

7. List of largest clock faces - Wikipedia

   en.wikipedia.org/wiki/List_of_largest_clock_faces

   A list of permanent working clocks with the largest faces in the world. Entries include all clocks with faces at least 4 m (13 ft) in diameter. Clocks can be located on the exterior or interior of buildings, and towers as well as on the ground as is the case with floral clock faces.