ISO TC 184/SC4 Official Web Site
Science, Reference, Standards, Individual Standards - ISO TC 184/SC4 Official Web Site. SC4 is the ISO submcommittee responsible for the development ISO 10303 and related standards.
http://www.tc184-sc4.org/
IEC
Science, Reference, Standards, Organizations - IEC. International Electrotechnical Commission.
https://www.iec.ch/
IDEMA
Science, Reference, Standards, Organizations - IDEMA. trade association for the data storage industry.
https://www.idema.org/
HyTime Users' Group Home Page
Science, Reference, Standards, Individual Standards - HyTime Users' Group. Detailed information on many aspects of this standard, with many useful links.
https://www.hytime.org/
The Internet Engineering Task Force
Science, Reference, Standards, Internet - The Internet Engineering Task Force. The Internet Engineering Task Force (IETF) is a large open international community of network designers, operators, vendors, and researchers concerned with the evolution of the Internet architecture and the smooth operation of the Internet.
https://www.ietf.org/