A timekeeper is a person that measures the passage of time. They may have additional functions in sports and business.

A timekeeper is a person who measures time with the assistance of a clock or a stopwatch.

In addition, a timekeeper records time, time taken, or time remaining during events such as sports matches. Along with the game clock, a timekeeper may be needed to manage clocks other gameplay clocks, including play clocks, pitch clocks, and shot clocks.

In business, a timekeeper tracks employee time, potentially using a time clock. Collecting such data gives employers insight into a workforce so that a business can then make operational decisions to increase productivity and reduce labor costs.

• Atomic clock
• Chess clock
• History of timekeeping devices
• Fully automatic time
• Horology
• Referee
• Sense of time
• Stopwatch
• Time clock
• Timegrapher
• Timesheet
• Time tracking software

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  Media related to Timekeepers at Wikimedia Commons
• A Walk Through Time at the National Institute of Standards and Technology
• "Treatise for Observers on Constructing the Circle of Projection" is a manuscript, in Arabic, from 1473, about timekeeping.