ISO/IEC 15505-2003 Information Technology - Telecommunications and Information Exchange between Systems - Private Integrated Services Network (PISN) - Specification, Functional Model and Information Flows - Message Waiting Indication Supplementary Service

ISO/IEC 15504-6-2013 Information technology - Process assessment - Part 6: An exemplar system life cycle process assessment model ISO/IEC 15504-5-2012 Information technology - Process assessment - Part 5: An exemplar software life cycle process assessment model ISO/IEC 15504-4-2004 Information technology Process assessment Part 4: Guidance on use for process improvement and process capability determination ISO/IEC 15506-2003 Information Technology - Telecommunications and Information Exchange between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - Message Waiting Indication Supplementary Service ISO/IEC 15507-1997 Information Technology - Telecommunications and Information Exchange between Systems - Private Integrated Services Network - Inter-Exchange Signalling Protocol - PINX Clock Synchroization ISO/IEC 15521-1998 Information Technology - 3,81 mm Wide Magnetic Tape Cartridge for Informatation Interchange - Helical Scan Recording - DDS-3 Format Using 125 m Length Tapes