| International mobile equipment identity | International Mobile Equipment Identity | International Mobile station Equipment Identity and Software Version Number |
| International mobile subscriber identity | International Mobile Subscriber Identity | International Model of the Year |
| International Model United Nations of Alkmaar | International Modern Media Institute | International Monetary Fund Administrative Tribunal |
| International Moral Education Congress | International Motor Sports Association | International Motorsports Hall of Fame |
| International Music Council | International Music Day | International Music Score Library Project |
| International music score library project | International New York Times | International Nomenclature of Cosmetic Ingredients |
| International Nonproprietary Name | International Normalised Ratio | International Normalized Ratio |
| International Nuclear Event Scale | International Okinawan Goju-Ryu Karate Federation | International Okinawan Goju-Ryu Karate Federation IOGKF |
| International Organisation for Standardization | International Organisation of Palaeobotany | International Organization |
| International Organization for Migration | International Organization for Standardization | International Orienteering Federation |
| International Ornithological Congress | International Osteoporosis Foundation | International P.E.N. |
| International Panorama Council | International Paper | International PEN |
| International Pencak Silat Federation | International Pharmaceutical Federation | International Pharmaceutical Students' Federation |
| International Phonetic Alphabet | International Phonetic Association | International Physicians for the Prevention of Nuclear War |
| International Phytosociological Society | International Plant Names Index | International Polar Foundation |
| International Police Association | International Police Task Force | International Pony |
| International Powerlifting Federation | International Presidency Tour | International Presidency Turkey Tour |
| International Press Freedom Awards | International Press Institute | International Press Telecommunications Council |
| International Primary Curriculum | International Professional Cycling Teams | International Project Management Association |
| International Protection | International Qajar Studies Association | International Queen of Flowers |
| International Rally Challenge in 2006 | International Renewable Energy Agency | International Renewable Energy Alliance |
| International Rescue Committee | International Review of Cytology | International Reviews in Physical Chemistry |
| International Rhodes Grand Prix | International Rice Research Institute | International Road Racing Championship |
| International Roma Union | International Romani Congres | International Romani Union |
| International Rose Test Garden | International Rowing Federation | International Rugby Board |
| International Rules Football | International Safe Harbour Principles | International Safety Guide for Oil Tankers and Terminals |
| International Safety Management Code | International Sailing Federation | International Sand Sculpture Festival |
| International School Amsterdam | International School Eindhoven | International School of Amsterdam |
| International School, Amsterdam | International Scout and Guide Fellowship | International Security Agency |
| International Security Alliance | International Security Assistance Force | International Series |
| International Shark Attack File | International Shooting Sport Federation | International Sign |
| International Sign Language | International Sivananda Yoga Vedanta Centres | International Six Days Enduro |
| International Six Days Trial | International Skating Union | International Soccer |
| International Soccer League | International Social Security Association | International Socialist Organization |
| International Society for Plant Pathology | International Society for Plant Taxonomy | International Society for Systems Science |
| International Society for the Systems Science | International Society for the Systems Sciences | International Society of Automation |
| International Society of Drug Bulletins | International Society of Plant Pathology | International Software Testing Qualifications Board |
| International Solar Alliance | International Solar Energy Society | International Somalia Contact Group |
| International Songwriting Competition | International SOS | International Space Station |
| International Space Station (ISS) | International Speed Skating League | International Sport Karate Association |
| International Sports Stadium | International Spy Museum | International Stadium Yokohama |
| International Standard Classification of Occupations | International Standard Identifier for Libraries and Related Organizations | International Standard Industrial Classification of All Economic Activities |
| International Standard Music Number | International Standard Name Identifier | International Standard Recording Code |
| International Standard Serial Number | International Statistical Classification of Diseases and Related Health Problems | International Student Conference |
| International Student Identity Card | International Student Stockey Tournament Twente | International Students' Committee |
| International Superhits | International Superhits! | International Superstar Soccer |
| International Superstar Soccer '98 | International Superstar Soccer 2000 | International Superstar Soccer 64 |
| International Superstar Soccer 98 | International Swimming Hall of Fame | International Swimming League |
| International swimming league | International Table Tennis Federation | International Taekwon-Do Federation |
| International Taekwondo Federation | International Taoist Tai Chi Society | International Telecommunication Union |
| International Tenerife Memorial | International Tennis Federation | International Tennis Hall of Fame |
| International Tennis Open | International Textile, Garment and Leather Workers' Federation | International Tibet Support Network |
| International Tourist Trophy | International Tournament | International Tracing Service |
| International Track and Field 2000 | International Trade Centre | International Trade Organization |
| International Trade Union Confederation - Asia Pacific | International Traditional Karate Federation | International Transport Workers' Federation |
| International Triathlon Union | International Tribunal for the Law of the Sea | International Tropical Timber Agreement, 1983 |
| International Tropical Timber Agreement, 1994 | International Tropical Timber Organization | International Typeface Corporation |
| International Ultraviolet Explorer | International Union Against Tuberculosis and Lung Disease | International Union for Conservation of Nature |
| International Union for Conservation of Nature and Natural Resources | International Union for Quaternary Research | International Union for the Conservation of Nature |
| International Union of Basic and Clinical Pharmacology | International Union of Food, Agricultural, Hotel, Restaurant, Catering, Tobacco and Allied Workers' Association | International Union of Geological Sciences |
| International Union of Pure and Applied Chemistry | International Union of Pure and Applied Physics | International Union of Railways |
| International Union of Socialist Youth | International Union of Students | International University Bremen |
| International University Sports Federation | International university sports federation | International Virtual Aviation Organisation |
| International Virtual Aviation Organization | International Watch Company | International Water Ski Federation |
| International Water Ski Union | International Waterski & Wakeboard Federation | International Wellness Resorts |
| International Whaling Commission | International Woman Suffrage Alliance | International Women's Media Foundation |
| International Yacht Racing Union | International Year of Biodiversity | Internationaldogday |
| Internationale | Internationale (lied) | Internationale 3-Etappen-Rundfahrt |
| Internationale 3-Lander Tour | Internationale 3-Länder Tour | Internationale Aardappelcrisis |
| Internationale Afghanistan-conferentie | Internationale Afghanistan-conferentie te Bonn in 2001 | Internationale Afghanistan-conferentie te Bonn in 2005 |
| Internationale Afghanistan-conferentie te Den Haag 31 maart 2009 | Internationale Afghanistan-conferentie te Den Haag op 31 maart 2009 | Internationale antidrugsdag |
| Internationale Antiracisme-conferentie 2009 | Internationale Antiracisme-conferentie te Genève | Internationale Antiracisme-conferentie te Genève (2009) |
| Internationale Antiracisme-conferentie te Genève 20-24 april 2009 ('Durban Review') | Internationale antwoordcoupon | Internationale Arbeiders Associatie |
| Internationale Arbeiders-Associatie | Internationale Arbeidersassociatie | Internationale Arbeidsconferentie |
| Internationale Arbeidsorganisatie | Internationale Archiefraad | Internationale Architectuur Biënnale |
| Internationale Architectuur Biënnale Rotterdam | Internationale Architectuur Biennale | Internationale Architectuur Biennale Rotterdam |
| Internationale Astronomische Unie | Internationale atleten | Internationale Atomenergieorganisation |
| Internationale Atoomtijd | Internationale Autobus-Onderneming | Internationale Autobusonderneming |
| Internationale Automobil-Ausstellung | Internationale Automobilausstellung | Internationale Bauausstellung |
| Internationale Beelden Collectie | Internationale Bepalingen ter Voorkoming van Aanvaringen op Zee | Internationale Bepalingen ter voorkoming van aanvaringen op zee |
| Internationale betrekkingen | Internationale Betrekkingen | Internationale Betrekkingen en Internationale Organisatie |
| Internationale Betrekkingen en Internationale Organisatie (IB/IO) | Internationale betrekkingen van Peru | Internationale betrekkingen van Suriname |
| Internationale Beweging voor een Imaginistisch Bauhaus | Internationale beweging voor het geweten van Krishna | Internationale Biathlonunie |
| Internationale Biatlonunie | Internationale Biologie Olympiade | Internationale Biologie-olympiade |
| Internationale Biologie-Olympiade | Internationale Bobslee- en Skeletonfederatie | Internationale bobslee- en skeletonfederatie |
| Internationale Boekenbeurs van Caïro | Internationale Boekenbeurs van Cairo | Internationale Boekenbeurs van Zimbabwe |
| Internationale Bond van Bouw- en Houtarbeiders | Internationale Boomfeestdag | Internationale Boomplantdag |
| Internationale Botanische Congres | Internationale Bouworde | Internationale braille |
| Internationale Brigade | Internationale Brigades | Internationale Broederschap |
| Internationale Brug der Broederschap | Internationale Brug der Vriendschap | Internationale Burgerluchtvaartorganisatie |
| Internationale Campagne tegen Landmijnen | Internationale Campagne tot Afschaffing van Kernwapens | Internationale Centrumcross |
| Internationale Christelijke Vakbond | Internationale Coördinatie van Revolutionaire Partijen en Organisaties | Internationale Code inzake brandveiligheidssystemen |
| Internationale code inzake de beveiliging van schepen en havenvoorzieningen | Internationale Code inzake reddingsmiddelen | Internationale Code van Botanische Nomenclatuur |
| Internationale Code van veiligheidsvoorschriften voor het vervoer van bestraalde splijtstoffen, plutonium en hoogradioactief afval in vaten aan boord van een schip | Internationale Code voor de bouw en uitrusting van schepen die gevaarlijke chemicaliën in bulk vervoeren | Internationale Code voor de bouw en uitrusting van schepen die vloeibaar gemaakte gassen in bulk vervoeren |
| Internationale Code voor de toepassing van beproevingsprocedures voor brandwerendheid | Internationale Code voor de veiligheid van hogesnelheidsschepen | Internationale code voor het uitgebreide inspectieprogramma tijdens inspecties van bulkvervoerders en olietankschepen |
| Internationale Code voor het veilig vervoer van graan in bulk | Internationale Code voor het vervoer van gevaarlijke stoffen over zee | Internationale Code voor scheepvaart in het poolgebied |
| Internationale Code voor schepen die in polaire wateren varen | Internationale Commissie ter Bescherming van de Donau | Internationale Commissie van Juristen |
| Internationale Commissie voor de Bescherming van de Donau | Internationale Commissie voor de doorgraving van de landengte van Suez | Internationale Commissie voor Ridderorden |
| Internationale Commissie voor Vermiste Personen | Internationale Communistische Partij | Internationale Compositiewedstrijd te Corciano |
| Internationale Concessie van Shanghai | Internationale Confederatie van Muziekverenigingen | Internationale confederatie van muziekverenigingen |
