and physical postal mail. ISO later added open routing standards (ITU-T Rec. X.412 | ISO/IEC 10021-10 and ITU-T Rec. X.404 | ISO/IEC 10021-11), but the initial
RM-ODP, also named ITU-T Rec. X.901-X.904 and ISO/IEC 10746, is a joint effort by the International Organization for Standardization (ISO), the International
Union (ITU). The standard ISO 3166-1 defines short identification codes for most countries and dependent areas: ISO 3166-1 alpha-2: two-letter code ISO 3166-1
mechanism standardized by the International Telecommunication Union (ITU) and ISO/IEC for naming any object, concept, or "thing" with a globally unambiguous
ISO/IEC 7498-3 Naming and addressing ISO/IEC 7498-4 Management framework ISO/IEC 7498-1 is also published as ITU-T Recommendation X.200. The recommendation