| Ian Rush | Ian Rush |
| Ian Smith | Ian Smith |
| Ian Somerhalder | Ian Somerhalder |
| Ian Thorpe | Ian Thorpe |
| Iannis Xenakis | Iannis Xenakis |
| Iapetus | Jápeto |
| Iapetus Ocean | Jápeto |
| Iapyx | Yápige |
| Iasion | Yasión |
| Iasius | Yaso |
| Iaso | Yaso |
| IATA airport code | Código de aeropuertos de IATA |
| IATA code | Código de aeropuertos de IATA |
| Iatrochemistry | Iatroquímica |
| Iatrogenesis | Iatrogenia |
| iatrogenic | yatrogénico |
| Iaşi | Iaşi |
| Iaşi County | Iaşi |
| IB | IB |
| IB Diploma Programme | Bachillerato Internacional |
| Ibadan | Ibadán |
| Ibadi | Ibadíes |
| Ibagué | Ibagué |
| Ibaizabal | Ibaizábal |
| Iban Iriondo | Iban Iriondo |
| Iban Mayo | Iban Mayo |
| Ibanez | Ibanez |
| Ibaraki Prefecture | Prefectura de Ibaraki |
| Ibarrangelu | Ibarranguelua |
| Ibarretxe Plan | Propuesta de Estatuto Político de la Comunidad de Euskadi |
| IBATIS | IBATIS |
| Ibb Governorate | Gobernación de Ibb |
| IBD registry | Colitis ulcerosa |
| Ibelin | Ibelín |
| Iberia | Iberia |
| Iberian | ibérico |
| Iberian Federalism | Iberismo |
| Iberian Frog | Rana iberica |
| Iberian language | Idioma ibero |
| Iberian Lynx | Lynx pardinus |
| Iberian Peninsula | península ibérica |
| Iberian Ribbed Newt | Pleurodeles waltl |
| Iberian Romance languages | Grupo Ibero-Romance |
| Iberian scripts | Signario íbero |
| Iberian Union | Imperio Hispano-Portugués |
| Iberian wall lizard | Podarcis hispanica |
| Iberian Wolf | Canis lupus signatus |
| Iberis | Iberis |
| Ibero-America | Iberoamérica |
| Ibero-American Summit | Cumbre Iberoamericana |
| Iberworld | Iberworld |
| Iberá Wetlands | Esteros del Iberá |
| ibex | íbice |
| Ibi | Instituto Bancario Italiano |
| Ibirapuera Park | Parque do Ibirapuera |
| ibis | ibis |
| Ibises | Threskiornithinae |
| Ibiza | Ibiza |
| Ibiza Airport | Aeropuerto de Ibiza |
| Ibiza Town | Ibiza |
| Ibizan Hound | Podenco ibicenco |
| Iblis | Satanás |
| IBM | IBM |
| IBM AIX | Advanced Interactive Executive |
| IBM AIX SMIT | SMIT |
| IBM Deep Blue | Deep Blue |
| IBM Information Management System | IMS |
| IBM Informix | Informix |
| IBM Lotus Freelance Graphics | IBM Lotus Freelance Graphics |
| IBM Lotus Notes | Lotus Notes |
| IBM Monochrome Display Adapter | Monochrome Display Adapter |
| IBM Multicolor Graphics Adapter | Multicolor Graphics Adapter |
| IBM PC compatible | Compatible IBM PC |
| IBM PC-DOS | PC-DOS |
| IBM Personal Computer | IBM PC |
| IBM POWER | IBM POWER |
| IBM Rational Unified Process | Proceso Unificado de Rational |
| IBM RPG | Lenguaje de programación RPG |
| IBM Systems Network Architecture | Systems Network Architecture |
| IBM Tivoli | Tivoli |
| IBM Tivoli Framework | Tívoli |
| IBM WebSphere | WebSphere |
| IBM WebSphere Application Server | WebSphere Application Server |
| Ibn al-Banna | Al-Marrakushi ibn Al-Banna |
| Ibn al-Haytham | Alhazen |
| Ibn al-Nafis | Ibn Nafis |
| Ibn Arabi | Ibn Arabi |
| Ibn Bajjah | Avempace |
| Ibn Battuta | Ibn Battuta |
| Ibn Khaldun | Ibn Jaldún |
| Ibn Khallikan | Ibn Khallikan |
| Ibn Saud of Saudi Arabia | Ibn Saud |
| Ibn Tufail | Abentofail |
| Ibn Tumart | Ibn Tumart |
