[1] [CITE@en[Clock drift - Wikipedia, the free encyclopedia]]
( ([TIME[2016-06-17 07:11:01 +09:00]]))
<https://en.wikipedia.org/wiki/Clock_drift>

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[2] [CITE@en[Time - ArchWiki]]
( ([TIME[2016-06-18 13:12:32 +09:00]]))
<https://wiki.archlinux.org/index.php/time#Time_skew>
]FIGCAPTION]

> Every clock has a value that differs from real time (the best representation of which being International Atomic Time); no clock is perfect. A quartz-based electronic clock keeps imperfect time, but maintains a consistent inaccuracy. This base 'inaccuracy' is known as 'time skew' or 'time drift'.

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[3] [CITE@en[expand 'clock drift' section in privacy/security]]
([[igrigorik]]著, [TIME[2016-10-01 09:57:36 +09:00]])
<https://github.com/w3c/hr-time/commit/4f49403c3c2ceb3d9e87a1efd0c3eba5b61c2587>