History of timekeeping devices
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Modern devices
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Early timekeeping devices
Timekeeping devices in Egypt
Timekeeping devices in China
Shadow clocks
Timesticks
Water clocks
Hourglasses
Candle clocks
Incense clocks
Modern devices
Clocks
Early mechanical clocks
Pendulum clocks
Clockmakers
Wristwatches
Chronometers
Quartz oscillators
Atomic clocks
Global Positioning System
Footnotes
Further reading