| I-węzeł | Inode |
| IAD | Internet addiction disorder |
| IAI Kfir | IAI Kfir |
| IAI Lavi | IAI Lavi |
| IAI Nesher | IAI Nesher |
| Iaido | Iaidō |
| Iaidō | Iaidō |
| Iain Banks | Iain Banks |
| Iajuddin Ahmed | Iajuddin Ahmed |
| Ialoveni | Ialoveni |
| Ialyssos | Ialysos |
| Ian Anderson | Ian Anderson |
| Ian Brown | Ian Brown |
| Ian Curtis | Ian Curtis |
| Ian Fleming | Ian Fleming |
| Ian Gillan | Ian Gillan |
| Ian Hamilton | Ian Standish Monteith Hamilton |
| Ian Haugland | Ian Haugland |
| Ian Hill | Ian Hill |
| Ian Holm | Ian Holm |
| Ian McCulloch | Ian McCulloch |
| Ian McDiarmid | Ian McDiarmid |
| Ian McEwan | Ian McEwan |
| Ian McKellen | Ian McKellen |
| Ian Murdock | Ian Murdock |
| Ian Paice | Ian Paice |
| Ian Porterfield | Ian Porterfield |
| Ian Rush | Ian Rush |
| Ian Smith | Ian Smith |
| Ian Somerhalder | Ian Somerhalder |
| Ian Stewart | Ian Stewart |
| Ian Stuart | Ian Stuart Donaldson |
| Ian Thorpe | Ian Thorpe |
| Iarcki | Iraqi |
| Iaso | Iaso |
| IAUDIO | Cowon |
| IAX | Inter-Asterisk eXchange |
| Ibach | Ibach |
| Ibadan | Ibadan |
| Ibadyci | Ibadi |
| Ibagué | Ibagué |
| IBAN | International Bank Account Number |
| Iban Mayo | Iban Mayo |
| Ibanez | Ibanez |
| Ibas z Edessy | Ibas |
| Ibbenbüren | Ibbenbüren |
| Ibbisin | Ibbi-Sin |
| Ibelin | Ibelin |
| Iberia | Iberia Airlines |
| Iberia kaukaska | Caucasian Iberia |
| Iberowie | Iberians |
| Iberystyka | Hispanic |
| Ibestad | Ibestad |
| ibis | ibis |
| Ibis czarnopióry | Australian White Ibis |
| Ibis kasztanowaty | Glossy Ibis |
| Ibisowate | Threskiornithidae |
| Ibiza | Ibiza |
| IBM | IBM |
| IBM Lotus Symphony | Lotus Symphony |
| IBM PC | IBM Personal Computer |
| IBM Portable PC | IBM Portable Personal Computer |
| IBM POWER | IBM POWER |
| IBM Tivoli Storage Manager | IBM Tivoli Storage Manager |
| IBM WebSphere MQ | IBM WebSphere MQ |
| Ibn al-Hajsam | Ibn al-Haytham |
| Ibn Chaldun | Ibn Khaldun |
| Ibn Haukal | Ibn Hawqal |
| Ibn Tajmija | Ibn Taymiyyah |
| Ibogaina | Ibogaine |
| Ibolya Csák | Ibolya Csák |
| IBook | IBook |
| Ibrahim Abboud | Ibrahim Abboud |
| Ibrahim al-Dżaafari | Ibrahim al-Jaafari |
| Ibrahim Babangida | Ibrahim Babangida |
| Ibrahim Boubacar Keita | Ibrahim Boubacar Keïta |
| Ibrahim Hannibal | Abram Petrovich Gannibal |
| Ibrahim ibn Jakub | Abraham ben Jacob |
| Ibrahim Pasza | Ibrahim Pasha of Egypt |
| Ibrahim Rugova | Ibrahim Rugova |
| Ibrahima Sonko | Ibrahima Sonko |
| Ibri | Ibri |
| Ibrox Park | Ibrox Stadium |
| Ibuprofen | Ibuprofen |
| IBV Vestmannaeyjar | Íþróttabandalag Vestmannaeyja |
| Ica | Ica |
| ICANN | ICANN |
| ICBL | International Campaign to Ban Landmines |
| Icchak Ben-Zwi | Yitzhak Ben-Zvi |
| Icchak Cukierman | Icchak Cukierman |
| Icchak Kacenelson | Itzhak Katzenelson |
| Icchak Kaduri | Yitzchak Kaduri |
| Icchak Nawon | Yitzhak Navon |
| Icchak Rabin | Yitzhak Rabin |
| Icchak Szamir | Yitzhak Shamir |
| Icchok Lejb Perec | Isaac Leib Peretz |
| ICD | Implantable cardioverter-defibrillator |
| Ice MC | Ian Campbell |
| Ice T | Ice T |
| Icecast | Icecast |
| Iced Earth | Iced Earth |
| Icelandair | Icelandair |
| Icenowie | Iceni |
| IceWeasel | IceWeasel |
| Icewind Dale | Icewind Dale II |
| ich | theirs |
| Ich noce | It Happened One Night |
| Ich pięcioro | Party of Five |
| IChat | IChat |
| Ichenhausen | Ichenhausen |
| Ichigo Kurosaki | Ichigo Kurosaki |
| Ichiro Ozawa | Ichirō Ozawa |
| Ichirō Hatoyama | Ichirō Hatoyama |
| Ichirō Mizuki | Ichiro Mizuki |
| Ichthys | Ichthys |
| ichtio- | ichthyo- |
| Ichtioftirioza | Ichthyophthirius multifiliis |
| ichtiologia | ichthyology |
| Ichtiostega | Ichthyostega |
| Icking | Icking |
| Icogne | Icogne |
| ICOGRADA | Icograda |
| Icon | Icon |
| Icy Tower | Icy Tower |
| Icyk Fefer | Itzik Feffer |
| Iczkeria | Chechen Republic of Ichkeria |
| id | id |
| Id al-Fitr | Eid al-Fitr |
| Ida | Ida |
| Ida Haendel | Ida Haendel |
| Ida Kamińska | Ida Kaminska |
| Ida Lotaryńska | Ida of Lorraine |
| Ida Noddack | Ida Noddack |
| Idaho | Idaho |
| Idan Raichel | Idan Raichel |
| Idan Tal | Idan Tal |
| idarubicyna | idarubicin |
| Idas | Idas |
| idea | idea |
| Idea leuconoe | Idea leuconoe |
| idealista | idealist |
| Idealizm | Idealism |
| idealny | ideal |
| Ideał główny | Principal ideal |
| Ideał pierwszy | Prime ideal |
| Idefix | Dogmatix |
| Idelette de Bure | Idelette Calvin |
| IDEN | Integrated Digital Enhanced Network |
| identyczny | very |
| identyfikacja | identification |
| identyfikacja produktów | product identification |
| Identyfikacja systemu | System identification |
| ideologia | ideology |
| ideologia polityczna | political ideology |
| ideologiczny | ideological |
| IDG | IDG |
| IDHEC | Institut des hautes études cinématographiques |
| Idi Amin | Idi Amin Dada |
| Idina Menzel | Idina Menzel |
| Idiofony | Idiophone |
| idiolekt | idiolect |
| idiom | idiom |
| idiota | idiot |
| idiotka | idiot |
| idiotyczny | idiotic |
| Idlib | Idlib |
| IDM | Intelligent dance music |
| ido | Ido |
| Ido odmiana esperanto | Ido |
| IDog | IDog |
| idol | idol |
| Idomeneus z Lampsaku | Idomeneus of Lampsacus |
| Idril | Idril |
| Idris I | Idris I of Libya |
| Idriss Carlos Kameni | Idriss Carlos Kameni |
| Idriss Déby | Idriss Déby |
| Idro | Idro |
| Idrottsparken | Idrottsparken |
| Idrysydzi | Idrisid dynasty |
| IDS Tower | IDS Center |
| Idumea | Edom |
| Idun | Iðunn |
| idy | ides |
| Idzi | Giles |
| Idź i patrz | Come and See |
| idź stąd | go away |
| Ieoh Ming Pei | I. M. Pei |
| Ieremia Tabai | Ieremia Tabai |
| IESE | IESE |
| IETF | Internet Engineering Task Force |
| Ievan Polkka | Ievan Polkka |
| Ieyasu Tokugawa | Tokugawa Ieyasu |
| IFA | Industrieverband Fahrzeugbau |
| Ifat | Ifat |
| Ife | Ife |
| Ifejon | Ipheion |
| Iffeldorf | Iffeldorf |
| Iffezheim | Iffezheim |
| Ifigenia | Iphigeneia |
| Ifigenia w Aulidzie | Iphigeneia at Aulis |
| Ifigenia w Taurydzie | Iphigeneia in Tauris |
| Ifikles | Iphicles |
| Ifitos | Iphitos |
| IFK Göteborg | IFK Göteborg |
| IFK Malmö | IFK Malmö |
| IFLA | International Federation of Library Associations and Institutions |
| IFLRY | International Federation of Liberal Youth |
| IFMIF | International Fusion Materials Irradiation Facility |
| IFolder | IFolder |
| IFOR | IFOR |
| IFR | Instrument flight rules |
| Ifrit | Ifrit |
| IFS | Iterated function system |
| iftar | iftar |
| IG Farben | IG Farben |
| Iga | IGA |
| Igalo | Igalo |
| Igarka | Igarka |
| IGBT | Insulated-gate bipolar transistor |
| IGCC | Combined cycle |
| Igensdorf | Igensdorf |
| Igerna | Igraine |
| Igersheim | Igersheim |
| IGES | IGES |
| Iggensbach | Iggensbach |
| Iggingen | Iggingen |
| Iggy Pop | Iggy Pop |
| Igieůka | Needle |
| Igis | Igis |
| Iglaste | Pinophyta |
| iglasty | coniferous |
| Iglesias | Iglesias |
| iglica | steeple |
