clock
Sign in to savethumb|An analog pendulum clock made around 18th century
AI overview
A clock is a device that measures and displays time, like the 18th-century pendulum clock shown here. Clocks matter because they help people organize their daily activities and coordinate with others by providing a reliable way to know what time it is.
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Article
44 sectionsContents
- Etymology
- History of time-measuring devices
- Sundials
- Devices that measure duration, elapsed time and intervals
- Water clocks
- Mechanical water clocks
- Fully mechanical
- Astronomical
- Spring-driven
- Pendulum
- Hairspring
- Marine chronometer
- Mass production
- Early electric
- Quartz
- Atomic
- Operation
- Power source
- Oscillator
- Synchronized or slave clocks
- Controller
- Counter chain
- Indicator
- Types
- Time display methods
- Analog
- Digital
- Hybrid (analog-digital)
- Auditory
- Word
- Projection
- Tactile
- Multi-display
- Purposes
- Time standards
- Navigation
- Sports and games
- Culture
- Folklore and superstition
- Specific types
- Awards
- Notes and references
- Bibliography
- External links
thumb|An analog pendulum clock made around 18th century
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. Devices operating on several physical processes have been used over the millennia.