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ITU-T X.622 Information technology - Protocol for providing the connectionless-mode Network service: Provision of the underlying service by an X.25 Subnetwork
ITU-T X.623 Information technology - Protocol for providing the connectionless-mode Network service: Provision of the underlying service by a subnetwork that provides the OSI Data Link service
ITU-T X.8 Multi-aspect PAD (MAP) framework and service definition
ITU-T X.863 Information technology - Open Systems Interconnection - Distributed Transaction Processing: Protocol Implementation Conformance Statement (PICS) proforma
ITU-T X.881 Information technology - Remote Operations: OSI realizations - Remote Operations Service Element (ROSE) service definition
ITU-T X.880 Information technology - Remote Operations: Concepts, model and notation
ITU-T X.882 Information technology - Remote Operations: OSI realizations - Remote Operations Service Element (ROSE) protocol specification
ITU-T X.803 Information technology - Open Systems Interconnection - Upper layers security model
ITU-R SM.1055-0 The use of spread spectrum techniques
ITU-R SM.1054-0 Monitoring of radio emissions from spacecraft at monitoring stations
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