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)