* RFC 738

[2] [CITE@en[RFC 738 - Time server]], [TIME[2021-01-24T11:53:15.000Z]], [TIME[2021-03-10T06:05:15.089Z]] <https://tools.ietf.org/html/rfc738>

* RFC 868

[3] [CITE@en[RFC 868 - Time Protocol]], [TIME[2021-01-24T15:31:30.000Z]], [TIME[2021-03-10T06:23:50.818Z]] <https://tools.ietf.org/html/rfc868>


[4] [CITE[RFC Errata Report » RFC Editor]], [TIME[2021-03-10T06:24:13.000Z]] <https://www.rfc-editor.org/errata_search.php?rfc=868>


[1] [CITE@en[NIST Internet Time Service (ITS) | NIST]], [TIME[2021-01-16T00:01:31.000Z]], [TIME[2021-01-16T07:41:34.571Z]] <https://www.nist.gov/pml/time-and-frequency-division/time-distribution/internet-time-service-its>

* 関連

[5] [[RFC 867]]

* メモ