Below is a complete list of sites we used during our research.
http://www.datamath.org/Datecodes.htm
https://www.hkinventory.com/p/d/215H21AGA21.htm
https://hedic.hkinventory.com/0703_001A/ContactUs.asp
https://www.techinsights.com/reports-and-subscriptions/open-market-reports/Report-Profile/?ReportKey=FAR-0506-002
https://pdf1.alldatasheet.com/datasheet-pdf/view/115441/SAMSUNG/K4H561638F-UC.html
https://www.samsung.com/us/smg/content/dam/samsung/us/aboutsamsung/2017/about-us-sustainability-report-and-policy-annual-report-2005-en.pdf
https://www.extremetech.com/electronics/56580-ati-hdtv-wonder/2
https://hothardware.com/reviews/ati-hdtv-wonder-preview
https://www.epochconverter.com/weeks/2004