Links
 
SDL Forum Society
The SDL Forum Society is a non-profit organization with the purpose of promoting SDL/MSC and support education on SDL/MSC.

ASN.1 Project

The ITU ASN.1 Project 
assist users of ASN.1, and promotes the usage of ASN.1 across a wide range of industries and standards bodies.

TDL

The Test Description Language (TDL)  
is the ETSI test language for specification of test descriptions and presentations of test execution results.

TTCN-3

Testing and Test Control Notation version 3 (TTCN-3)  
is the globally standardised test language for test specification of black box systems.
ETSI - European Telecommunications Standards Institute
the organization that develops and maintains european telecommunications standards.
 
ITU-T - IUT Telecommunication Standardization Sector
ITU-T is the international organization that develops international standards known as ITU-T Recommendations which act as defining elements in the global infrastructure of information and communication technologies (ICTs)