[1] 497日 ‐ 通信用語の基礎知識 () https://www.wdic.org/w/TECH/497%E6%97%A5
[5] All the TCP/IP ports that are in a TIME_WAIT status are not closed after 497 days from system startup in Windows Vista, in Windows 7, in Windows Server 2008 and in Windows Server 2008 R2 - Microsoft Support, https://support.microsoft.com/en-us/topic/all-the-tcp-ip-ports-that-are-in-a-time-wait-status-are-not-closed-after-497-days-from-system-startup-in-windows-vista-in-windows-7-in-windows-server-2008-and-in-windows-server-2008-r2-38c81adc-d990-c6f7-3689-91cca5d19a20
[8] To keep a Boeing Dreamliner flying, reboot once every 248 days () https://www.engadget.com/2015-05-01-boeing-787-dreamliner-software-bug.html?_fsig=BoE1kOFEwuYg7Ip1pGil_w--%7EA
[2] 49.7日 ‐ 通信用語の基礎知識 () https://www.wdic.org/w/TECH/49.7%E6%97%A5
[6] Computer Hangs After 49.7 Days, , https://web.archive.org/web/19990508050925/http://support.microsoft.com/support/kb/articles/q216/6/41.asp
[3] 24.9日 ‐ 通信用語の基礎知識 () https://www.wdic.org/w/TECH/24.9%E6%97%A5
[4] 248日 ‐ 通信用語の基礎知識 () https://www.wdic.org/w/TECH/248%E6%97%A5
[7] Time formatting and storage bugs - Wikipedia, , https://en.wikipedia.org/wiki/Time_formatting_and_storage_bugs#Relative_time_overflow
497日、49.7日、248日、51日、49.71日
[9] Boeing 787s must be turned off and on every 51 days to prevent 'misleading data' being shown to pilots • The Register, https://www.theregister.com/2020/04/02/boeing_787_power_cycle_51_days_stale_data/