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Hlavná: Reference: Time: Clocks_and_Watches:

See also:

• Business: Business Services: Supplies and Equipment: Time Recording and Management  (95)
• Computers: Software: Accounting: Time Tracking  (112)
• Computers: Software: Human Resources: Time Keeping Systems  (57)
• Science: Astronomy: Calendars and Timekeeping  (55)

» Cesium Atomic Clocks - Kinds of cesium clocks, with pictures, plus a description of their operation and the science behind them.




» Doug's Atomic Clocks - Details on Doug Hogarth's experiments with his atomic clock.




» How Stuff Works: Atomic Clock - Concise history, background, definitions and operational information regarding atomic clocks.




» How Stuff Works: Pendulum Clock - Concise description using drawings and animation to show the operation of a pendulum clock.




» Smithsonian Institute - On Time - History of the clock and how Americans have measured time and been affected by it.

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