| IAAA | I Am An Accountant | |
| IAAL | I Am A Lawyer or Lover | |
| IAC | In Any Case | |
| IAE | In Any Event | |
| IAG | It's All Good | |
| IAM | In A Minute | |
| IANAA | I Am Not An Accountant | |
| IANAC | I Am Not A Crook | |
| IANAL | I Am Not A Lawyer | |
| IAW | In Accordance With | |
| IAWTC | I Agree With The Comment | |
| IAYF | It's All Your Fault | |
| IB | I'm Back | |
| IB2D | I Beg To Differ | |
| IBTD | I Beg To Differ | |
| IC | I See | |
| IC | In Character | |
| ICBW | I Could Be Wrong | |
| ICL | In Christian Love | |
| ICOCBW | I Could, Of Course, Be Wrong | |
| ICURNVS | I See You Are Envious | |
| ID10T | Idiot | |
| IDC | I Don't Care | |
| IDGI | I Don't Get It | |
| IDGRA | I Don't Give A Rat's Aspic | |
| IDK | I Don’t Know | |
| IDKY | I Don’t Know You | |
| IDMB | I'll Do My Best | |
| IDNDT | I Did Not Do That | |
| IDNK | I Do Not Know | |
| IDTS | I Don’t Think So | |
| IE | That Is (Latin: Id Est | |
| IFAB | I Found A Bug | |
| IGGY | Ignored | |
| IGTP | I Get The Point | |
| IHA | I Hate Acronyms | |
| IHAIM | I Have Another Instant Message | |
| IHNO | I Have No Opinion | |
| IIABDFI | If It Ain't Broke, Don't Fix It | |
| IIRC | If I Remember Correctly | |
| IIWM | If It Were Me,/If It Were Mine | |
| IJWTS | I Just Want To Say | |
| IK | I Know | |
| IKHYF | I Know How You Feel | |
| IKWUM | I Know What You Mean | |
| ILU | I Love You | |
| ILUB | I Love You Baby | |
| ILUM | I Love You Man | |
| ILUVU | I Love You | |
| ILY | I Love You | |
| ILYK | I'll Let You Know | |
| IM | Instant Message | |
| IMA | I Might Add | |
| IMAO | In My Arrogant Opinion | |
| IMCO | In My Considered Opinion | |
| IME | In My Experience | |
| IMHARO | In My Humble And Respectful Opinion | |
| IMHBMAO | In My Humble But Most Accurate Opinion | |
| IMHO | In My Humble Opinion | |
| IMing | Chatting With Someone Online | |
| IMIO | In My Infallible Opinion | |
| IMNSHO | In My Not So Humble Opinion | |
| IMNSVHO | In My Not So Very Humble Opinion | |
| IMO | In My Opinion | |
| IMOT | I'm On That | |
| IMPOV | In My Point Of View | |
| IMS | I Am Sorry | |
| IMTG | In Meeting | |
| IMVHO | In My Very Humble Opinion | |
| INMP | It’s Not My Problem | |
| INPO | In No Particular Order | |
| INRS | It's Not Rocket Science | |
| IOH | I'm Outta Here | |
| IOW | In Other Words | |
| IPN | I'm Posting Naked | |
| IR8 | Irate | |
| IRL | In Real Life | |
| IRSTBO | It Really Sucks The Big One | |
| IRT | In Reply To | |
| IS | I'm Sorry | |
| ISH | I'm So Hungry | |
| ISO | In Search Of | |
| ISO | Is Seeking Other | |
| ISP | Internet Service Provider | |
| ISS | I'm So Sure | |
| INSS | I'm Not So Sure | |
| ISTM | It Seems To Me | |
| ISWIM | If (You) See What I Mean | |
| ISWTM | I See What You Mean | |
| ITFA | In The Final Analysis | |
| ITMT | In The Mean Time | |
| ITSFWI | If The Shoe Fits, Wear It | |
| ITYM | I Think You Mean | |
| ITYS | I Told You So | |
| IWALU | I Will Always Love You | |
| IWBNI | It Would Be Nice If | |
| IWTY | I Would Tickle You | |
| IYFEG | Insert Your Favorite Ethnic Group | |
| IYKWIM | If You Know What I Mean | |
| IYO | In Your Opinion | |
| IYQ | I Like You | |
| IYSS | If You Say So | |
| IYSWIM | If You See What I Mean | |
| (-: to the Emoticons :-) |
