[1] http://www.re.be/css2xslfo/1_3_2/manual.pdf#page=25

[2] 920342 – Schmap blocks Firefox for Android users from using site ( (2013-11-05 11:51:00 +09:00 版)) https://bugzilla.mozilla.org/show_bug.cgi?id=920342

[3] Define window.orientation ( (Anne van Kesteren 著, 2013-11-05 20:03:24 +09:00 版)) http://lists.w3.org/Archives/Public/public-webapps/2013OctDec/0358.html

[4] Issue #7. Add an IDL for WindowOrientation interface. · whatwg/compat@d8f6bcf (2015-09-07 13:01:40 +09:00 版) https://github.com/whatwg/compat/commit/d8f6bcff8d6c6226af93e40cf0b2d5252c719609

[5] Issue #7. Add OrientationChangeEvent interface. · whatwg/compat@5da4208 (2015-09-09 15:44:41 +09:00 版) https://github.com/whatwg/compat/commit/5da42086a9597d4d0de09ae9127d1f8e91b06433

[6] Fixes #10. Add non-Desktop requirements for window.orientation/orient… · whatwg/compat@38310a0 (2015-12-07 15:43:40 +09:00 版) https://github.com/whatwg/compat/commit/38310a09fa626080d7a5792119d8bbbece8deddb

[7] Fixes #23. s/non-Desktop/Desktop/ typo. · whatwg/compat@0868447 (2015-12-15 19:57:59 +09:00 版) https://github.com/whatwg/compat/commit/0868447854770223db24d974102caf6c1ab2716c

[8] Add [SameObject] to the `Screen.orientation` attribute (#111) (pozdnyakov著, 2017-11-05 00:43:22 +09:00) https://github.com/w3c/screen-orientation/commit/e3d83494c7d156c15bcdf0b69204160a53f0d585

[9] Add [SameObject] to the `Screen.orientation` attribute by pozdnyakov · Pull Request #111 · w3c/screen-orientation (2017-11-06 12:41:48 +09:00) https://github.com/w3c/screen-orientation/pull/111

[10] Editorial: fix to the `orientation` member (#672) (xfq著, 2018-05-08 11:50:37 +09:00) https://github.com/w3c/manifest/commit/ae34b016214ad0ce6e2e809614bf26f4ed5dd30b

[11] Editorial fix to the `orientation` member by xfq · Pull Request #672 · w3c/manifest (2018-05-10 12:12:30 +09:00) https://github.com/w3c/manifest/pull/672