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2. History of timekeeping devices - Wikipedia

   en.wikipedia.org/wiki/History_of_timekeeping_devices

   Devices and methods for keeping time have gradually improved through a series of new inventions, starting with measuring time by continuous processes, such as the flow of liquid in water clocks, to mechanical clocks, and eventually repetitive, oscillatory processes, such as the swing of pendulums. Oscillating timekeepers are used in modern ...

3. Timeline of time measurement inventions - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_time...

   This timeline of time measurement inventions is a chronological list of particularly important or significant technological inventions relating to timekeeping devices and their inventors, where known. Note: Dates for inventions are often controversial. Sometimes inventions are invented by several inventors around the same time, or may be ...

4. Italian six-hour clock - Wikipedia

   en.wikipedia.org/wiki/Italian_six-hour_clock

   The six-hour clock ( Italian: sistema orario a sei ore ), also called the Roman ( alla romana) or the Italian ( all'italiana) system, is a system of date and time notation in Italy which was invented before the modern 24-hour clock. In this system, the day starts at the evening Ave Maria at the end of twilight, approximately half an hour after ...

5. Chronometry - Wikipedia

   en.wikipedia.org/wiki/Time_and_frequency_metrology

   Chronometry [a] or horology [b] ( lit. 'the study of time') is the science studying the measurement of time and timekeeping. [3] Chronometry enables the establishment of standard measurements of time, which have applications in a broad range of social and scientific areas. Horology usually refers specifically to the study of mechanical ...

6. Clock - Wikipedia

   en.wikipedia.org/wiki/Clock

   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 as the day, the lunar month, and the year.

7. Chronometer watch - Wikipedia

   en.wikipedia.org/wiki/Chronometer_watch

   Chronometer watch. A chronometer ( Ancient Greek: χρονόμετρον, khronómetron, "time measurer") is an extraordinarily accurate mechanical timepiece, with an original focus on the needs of maritime navigation. In Switzerland, timepieces certified by the Contrôle Officiel Suisse des Chronomètres ( COSC) may be marked as Certified ...