– (i) Intel Science Talent Search ISU (i) Integrated Sight Unit International Skating Union IT it – (s) Italian language (ISO 639-1 code) IT (i) InferoTemporal (neurophysiology) Information Technology (s) Italy (FIPS 10-4 country code; ISO 3166 digram) ita – (s) Italian language (ISO 639-2 code) ITA – (s) Italy (ISO 3166 trigram) ITAG – (i) Inertial Terrain-Aided Guidance ITALY – (a) I'll Truly Always Love You ITAS – (i) Improved Target Acquisition Sight ITC – (i) InferoTemporal Cortex (neurophysiology) ITCZ – (i/p) Intertropical Convergence Zone ITEC – (a) Information Technology Exposition & Conference ITEMS – (a) Interactive Tactical Environment Management System ITER – (a) International Thermonuclear Experimental Reactor ITF – (a) International Tennis Federation ITK – (a) In The Know ITN – (i) Independent Television News (British) ITS (i) Incompatible Time-sharing System Individual Training Standards ITT – (i) International Telephone and Telegraph (U.S.) ITTO – (i) International Tropical Timber Organization ITU (i) Intent-to-Use International Telecommunication Union (International Telegraph Union 1865–1932) IU iu – (s) (s) Inuktitut language (ISO 639-1 code) IUCN – (i) International Union for the Conservation of Nature and Natural Resources (World Conservation Union) IUD – (i) Intrauterine device (https://www.plannedparenthood.org/learn/birth-control/iud) IUI – (i) Intrauterine insemination (http://americanpregnancy.org/infertility/intrauterine-insemination/) IUPAC – (a) International Union of Pure and Applied Chemistry (pronounced "eye-yoo-pac") IUPUI – (a) Indiana University – Purdue University Indianapolis IUSS – (i) Integrated Undersea Surveillance System – Integrated Unit Simulation System – International Union of Soil Sciences IV IV – (s) Côte d'Ivoire (FIPS 10-4 country code; from Ivory Coast) – Four (in Roman numerals) – (i) IntraVenous (as in intravenous drip or intravenous therapy) IVD – (i) Internet Video Device, intra vas device Iveco – (p) Industrial Vehicles Corporation IVF – (i) In Vitro Fertilisation IVI – (i) Interchangeable Virtual Instrument IVIS – (i/a) Inter-Vehicle Information System IVL – (i) Inter-Visibility Line IVM – (i) In Vitro [Oocyte] Maturation IVO – (i) In Vicinity Of IW IW – (i) Impact Wrestling IW – (i) Information Warfare IWARS – (p) Infantry Warrior Simulation IWC – (i) International Whaling Commission IWT – (i) Illegal Wildlife Trade IWW – (i) Industrial Workers of the World IX IX – (s) Nine (in Roman numerals) IXT – (s) IntraText digital library; IntraText lexical hypertext IY IY – (s) Saudi–Iraqi neutral zone (FIPS 10-4 territory code; obsolete 1993) IYKYK – (i) If You Know You Know IZ IZ – (s) Iraq (FIPS 10-4 country