(Main list of acronyms) I – (s) Iodine – One (in Roman numerals) I0–9 I2WD or I2WD – (i) U.S. Intelligence and Information Warfare Directorate (CERDEC) IA ia – (s) Interlingua language (ISO 639-1 code) IA – (s) Iowa (postal symbol) IAAF – (i) International Association of Athletics Federations ("International Amateur Athletics Federation" from 1912 to 2001; renamed "World Athletics" in 2019) IAAL – (i) I Am A Lawyer IAAS - (p) Infrastructure-as-a-Service IAB – (i) International Association for Biologicals IACREOT – (i) International Association of Clerks, Recorders, Election Officials, and Treasurers IAD – (i) Ion Assisted Deposition IADS – (i) Integrated Air Defence System IAEA – (i) International Atomic Energy Agency IAF – {i} Industrial Areas Foundation IAFG – (i) Information Assurance Focus Group IAI – (i) International African Institute – Israel Aircraft Industries IANA – (i) Internet Assigned Numbers Authority IANAL – (i) I Am Not A Lawyer IAPD International Associates of Paediatric(sic) Dentistry (i) Investment Adviser Public Disclosure iShares Asia Pacific Dividend IAQ – (i) Indoor air quality – Infrequently Asked Questions IAS – (i) Image Assessment System IASIP – (i) It's Always Sunny in Philadelphia IATA – (a/i) International Air Transport Association IATF – International Automotive Task Force IATSE – International Alliance of Theatrical Stage Employees IAU – (i) International Association of Universities – International Astronomical Union IAUC – (i) International Astronomical Union Circular IAW – (i) In Accordance With IB IB – (i) International Baccalaureate IBA – (i) Important Bird Area IBD – (i) Inflammatory Bowel Disease IBDM – (i) Information Based Decision Making IBDS – (i) Integrated Biological Detection System – International Business Development Specialist IBF - International Boxing Federation IBGe – (i) Isobutylgermane IBGE – (i) Instituto Brasileiro de Geografia e Estatística (Portuguese, "Brazilian Institute of Geography and Statistics") IBHOF - International Boxing Hall of Fame IBM – (i) International Business Machines ibo – (s) Igbo language (ISO 639-2 code) IBRD – (i) International Bank for Reconstruction and Development (part of the World Bank) IBS – (i) Irritable Bowel Syndrome IC IC (s) Ice Crystals (METAR Code) Iceland (FIPS 10-4 country code) (i) Integrated Circuit - [inner circle] ICANN – (a) Internet Corporation for Assigned Names and Numbers ICAO – (i) International Civil Aviation Organization ICBM – (i) Intercontinental Ballistic Missile ICBM – I see (phonetically "c") BatMan ICBN – (i) International Code of Botanical Nomenclature ICC (i) Integrated Command and Control International