| Ian McDiarmid | Ian McDiarmid |
| Ian McEwan | Ian McEwan |
| Ian McKellen | Ian McKellen |
| Ian Murdock | Ian Murdock |
| Ian Paice | Ian Paice |
| Ian Paisley | Ian Paisley |
| Ian Rush | Ian Rush |
| Ian Smith | Ian Smith |
| Ian Somerhalder | Ian Somerhalder |
| Ian Thorpe | Ian Thorpe |
| Ianira | Ianira |
| Iannis Xenakis | Iannis Xenakis |
| Iapetus | Giapeto |
| Iapetus Ocean | Giapeto |
| Iapyges | Iapigi |
| Iarnród Éireann | IE |
| Iasion | Iasione |
| IATA airline designator | Codice vettore IATA |
| IATA airport code | Codice aeroportuale IATA |
| IATA code | Codice aeroportuale IATA |
| Iatrogenesis | Iatrogenesi |
| Iazyges | Iazigi |
| Iazygi | Iazigi |
| Iaşi | Iaşi |
| Iaşi County | Distretto di Iaşi |
| Iaşi pogrom | Pogrom di Iaşi |
| IB | IB |
| Ibach | Ibach |
| Ibadan | Ibadan |
| Ibadi | Ibaditi |
| Ibagué | Ibagué |
| Iban Mayo | Iban Mayo |
| Iban Zubiaurre | Iban Zubiaurre |
| Ibanez | Ibanez |
| Ibar River | Ibar |
| Ibaraki | Ibaraki |
| Ibaraki Prefecture | Prefettura di Ibaraki |
| Ibarrangelu | Ibarrangelu |
| Ibb Governorate | Governatorato di Ibb |
| Ibbenbüren | Ibbenbüren |
| Ibbi-Sin | Ibbi-Sin |
| Ibelin | Ibelin |
| Iberia | Iberia |
| Iberian | Spagna |
| Iberian Federalism | Iberismo |
| Iberian Lynx | Lynx pardinus |
| Iberian Peninsula | Penisola iberica |
| Ibestad | Ibestad |
| ibex | stambecco |
| Ibicella lutea | Ibicella lutea |
| Ibid | Ibidem |
| ibidem | nello stesso luogo |
| Ibirapuera Park | Park jalemo |
| ibis | ibis |
| Ibiza | Ibiza |
| Ibiza Town | Ibiza |
| Iblis | Iblis |
| IBM | IBM |
| IBM Deep Blue | IBM Deep Blue |
| IBM Lotus Notes | Lotus Notes |
| IBM NORC | IBM NORC |
| IBM PC compatible | PC |
| IBM PC-DOS | PC-DOS |
| IBM Personal Computer | PC IBM |
| IBM Personal Computer XT | IBM Personal Computer XT |
| IBM POWER | POWER |
| IBM Rational Unified Process | Rational Unified Process |
| IBM Roadrunner | IBM Roadrunner |
| IBM RPG | RPG |
| IBM System p | IBM System p |
| IBM Systems Network Architecture | Systems Network Architecture |
| IBM Tivoli | Tivoli |
| IBM Tivoli Framework | Tivoli |
