| Ionone | Jonon |
| ionosphere | ionosfeer |
| IOS | Ios |
| Ios Island | Ios |
| iota | jota |
| Iota Aurigae | Hassaleh |
| Iota Boötis | Asellus Secondus |
| Iota Draconis | Ed Asich |
| Iota Orionis | Nair al Saif |
| Iota subscript | Iota subscriptum |
| Iota Ursae Majoris | Talitha |
| Iota Virginis | Syrma |
| IOU | schuldbekentenis |
| Iowa | Iowa |
| Iowa - Des Moines | Staten van de Verenigde Staten |
| Iowa County | Iowa County |
| Iowa tribe | Iowa |
| IP | IP |
| IP address | IP-adres |
| IP address spoofing | Internet Protocol Spoofing |
| IP Code | Internetprotocol |
| IP Multimedia Subsystem | IP Multimedia Subsystem |
| IPA | Internationaal Fonetisch Alfabet |
| Ipanema | Ipanema |
| Ipatiev House | Ipatiev-huis |
| IPBX | Intranet Private Branch eXchange |
| Ipeľ | Ipeľ |
| Iphicles | Iphikles |
| Iphicrates | Iphicrates |
| Iphigeneia | Iphigenia |
| Iphigeneia at Aulis | Iphigeneia in Aulis |
| Iphigeneia in Tauris | Iphigeneia in Tauris |
| Iphigenia | Iphigenia |
| Iphigenia in Tauris | Iphigeneia in Tauris |
| Iphigenie auf Tauris | Iphigeneia in Tauris |
| Iphigénie en Aulide | Iphigeneia in Aulis |
| Iphigénie en Tauride | Iphigeneia in Tauris |
| Iphofen | Iphofen |
| Ipil | Merbau |
| IPNI | International Plant Names Index |
| IPO | Primaire emissie |
| IPod mini | Apple iPod mini |
| IPod nano | Apple iPod nano |
| Ipomoea | Ipomoea |
| Ipomoea alba | Maanbloem |
| Ipomoea aquatica | Waterspinazie |
| Ipomoea pes-caprae | Geitenhoefwinde |
| IPOOO | IPOOO |
| Iporá Microregion | Iporá |
| Ipotane | Silene |
| Ippenschied | Ippenschied |
| Ippesheim | Ippesheim |
| Ippolito Rosellini | Ippolito Rosellini |
| Ipsach | Ipsach |
| IPsec | IPsec |
| Ipsheim | Ipsheim |
| Ipswich | Ipswich |
| IPTV | IPTV |
| IPU | Ipu |
| IQ | IQ |
