digital clock
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A digital clock is a type of clock that displays the time digitally, i.e. in cyphers, as opposed to an analog clock, where the time is displayed by hands. Usually, digitally clocks are associated with electronic drives. (Analog clocks are driven mechanically or electronically.)
Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 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 more commonly used hour sequence is 12 hour format (with some indication of AM or PM). Digital emulations of analog-style faces exist as well.
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