Clock
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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 a
An analog pendulum clock made around 18th century
Casio F-91W digital watch, a historically popular watch introduced in 1989
Simple horizontal sundial
The flow of sand in an hourglass can be used to keep track of elapsed time.
Striking clock
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A striking clock is a clock that sounds the hours audibly on a bell, gong, or other audible device. In 12-hour striking, used most commonly in striking clocks today, the clock strikes once at 1:00 am,
The Elizabeth Tower of the Palace of Westminster in London, commonly referred to as Big Ben, is a famous striking clock.
