| ITYL | | I'll Tell You Later |
| itylm | | I think you like me |
| itys | | I Think You Stink |
| itys | | I Told You So |
| itys | | its |
| ITYWF | | I Think You Will Find |
| ITYWFI | | I'll Take Your Word For It |
| iu2luvu | | i used to love you |
| iu2luvubiaon | | I used to love you but it's all over now |
| iu2u | | It's up to you |
| iucmd | | if you catch my drift |
| IUD | | Insert Usual Disclaimers |
| IUD | | Inter Uterine Device |
| IUD | | Intrauterine Device |
| ium | | If You Must |
| IURD | | in your dreams |
| IUSS | | If You Say So |
| IUSWIM | | If You See What I Mean |
| IUT | | Institute of Technology |
| IUTHALORFH | | I used to have a lot of respect for her |
| IUTHALORFH | | I used to have a lot of respect for him |
| IUTKATS | | I Used To Know All That Stuff |
| iuty | | it's up to you |
| ivdso | | In very desperate search of |
| IVF | | in vitro fertilisation |
| IVF | | In vitro fertilization |
| IVL | | In Virtual Life |
| IVR | | In Virtual Reality |
| IVR | | Interacative Voice Response |
| IVR | | Interactive Voice Response |
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