The following Org links do not work:

BDA | www.blu-raydisc.com
IEC TC100 | tc100.iec.ch
IEEE P1588 | www.ieee1588.com
IEEE P1722a | standards.ieee.org/develop/project/1722a.html
ISO/IEC JTC 1/SC29 | www.itscj.ipsj.or.jp/sc29/ (other link resolves)

This one appears to have a name change: (to Avixa, https://www.avixa.org/?)
InfoComm | www.infocomm.org