(n) proletarian internationalism
(n) International Space Station
(n) International Commission on Radiological Protection
ICRP
(n) (obsc) United Nations Conference on Environment and Development
(n) Food and Agriculture Organization of the United Nations
(n) (obsc) United Nations Conference on the Human Environment
(n) International Telegraph and Telephone Consultative Committee
CCITT
(n) (comp) International Standard Serial Number
ISSN
(n) (comp) Comite Consultatif International des Radiocommunications
CCIR
(n) United Nations Security Council
(n) United Nations Economic and Social Council
(n) (comp) International Serials Data System
ISDS
(n) United Nations Special Commission
UNSCOM
(n) (comp) International Telecommunications Union - Telecommunication Standardization Sector (formerly CCITT)
ITU-TS