[1] Navigator HW Concurrency - WHATWG Wiki ( (2014-05-27 20:32:20 +09:00 版)) http://wiki.whatwg.org/wiki/Navigator_HW_Concurrency

[2] Intent to implement and ship: navigator.hardwareConcurrency - Google グループ ( (2014-07-02 08:56:57 +09:00 版)) https://groups.google.com/forum/#!msg/mozilla.dev.platform/QnhfUVw9jCI/PEFuf5a_0YQJ

[3] Add navigator.hardwareConcurrency · whatwg/html@87b8402 (2016-03-17 22:14:03 +09:00 版) https://github.com/whatwg/html/commit/87b8402079f63cc6adfd2b21fb67231a02f00933