| Abbreviation | Meaning |
| ADN | Any day now |
| AFAIK | As far as I know |
| AFK | Away from keyboard |
| ARE | Acronym-rich environment |
| B4N | Bye for now |
| BAK | Back at the keyboard |
| BBIAB | Be back in a bit |
| BBL | Be back later |
| BEG | Big evil grin |
| BFN | Bye for now |
| BG | Big grin |
| BL | Belly laughing |
| BOTEC | Back-of-the-envelope calculation |
| BRB | Be right back |
| BTA | But then again... |
| BTW | By the way |
| CU | See you |
| CUL | See you later |
| CUL8ER | See you later |
| CYO | See you online |
| DBA | Doing business as |
| DFLA | Disenhanced four-letter acronym (that is, a TLA) |
| DIKU | Do I know you? |
| DITYID | Did I tell you I'm distressed? |
| DQMOT | Don't quote me on this |
| EG | Evil grin |
| EMFBI | Excuse me for butting in |
| EOM | End of message |
| EOT | End of thread (meaning: end of discussion) |
| ETLA | Extended three-letter acronym (that is, an FLA) |
| F2F | Face to face |
| FAQ | Frequently-ask question(s) |
| FISH | First in, still here |
| FLA | Four-letter acronym |
| FMTYEWTK | Far more than you ever wanted to know |
| FOMCL | Falling off my chair laughing |
| FUD | Fear, Uncertainty, and Doubt |
| FWIW | For what it's worth |
| FYI | For your information |
| G | Grin |
| GA | Go ahead |
| GAL | Get a life |
| GD&R | Grinning, ducking, and running |
| GIWIST | Gee, I wish I'd said that |
| GMTA | Great minds think alike |
| GOL | Giggling out loud |
| GTRM | Going to read mail |
| HTH | Hope this helps |
| IAC | In any case |
| IANAL | I am not a lawyer (but) |
| IC | I see |
| IHA | I hate acronyms |
| IIRC | If I recall/remember/recollect correctly |
| ILU or ILY | I love you |
| IM | Immediate message |
| IMHO | In my humble opinion |
| IMing | Chatting with someone online usually while doing other things such as playing trivia or other interactive game |
| IMNSHO | In my not so humble opinion |
| IOW | In other words |
| IPN | I'm posting naked |
| IRL | In real life (that is, when not chatting) |
| IYSWIM | If you see what I mean |
| JBOD | Just a bunch of disks (like RAID, etc.) |
| JIC | Just in case |
| JK | Just kidding |
| KWIM? | Know what I mean? |
| L8R | Later |
| LD | Later, dude |
| LDR | Long-distance relationship |
| LLTA | Lots and lots of thunderous applause |
| LOL | Laughing out loud |
| LTM | Laugh to myself |
| MorF | Male or female |
| MOSS | Member of the same sex |
| MOTOS | Member of the opposite sex |
| NFW | No feasible way |
| NRN | No response necessary |
| OIC | Oh, I see |
| OTOH | On the other hand |
| OTF | Off the floor |
| OTOH | On the other hand |
| OTTOMH | Off the top of my head |
| PANS | Pretty awesome new stuff |
| PCMCIA | People can't master computer industry acronyms |
| PMFJIB | Pardon me for jumping in but... |
| ::POOF:: | Goodbye (leaving the room) |
| POTS | Plain old telephone service |
| PU | That stinks! |
| RL | Real life (that is, when not chatting) |
| ROR | Raffing out roud (Engrish for "laughing out loud") |
| ROTFL | Rolling on the floor laughing |
| RPG | Role-playing games |
| RSN | Real soon now |
| SO | Significant other |
| SOMY | Sick of me yet? |
| STW | Search the Web |
| TAFN | That's all for now |
| TFH | Thread from hell (a discussion that just won't die and is often irrelevant to the purpose of the forum or group) |
| TGIF | Thank God it's Friday |
| THX | Thanks |
| TIA | Thanks in advance (used if you post a question and are expecting a helpful reply) |
| TLA | Three-letter acronym |
| TLK2UL8R | Talk to you later |
| TPTB | The powers that be |
| TTFN | Ta-Ta for now |
| TTYL | Talk to you later |
| TU | Thank you |
| UW | You're welcome |
| VBG | Very big grin |
| WDALYIC | Who died and left you in charge? |
| WFM | Works for me |
| WIBNI | Wouldn't it be nice if |
| WT? | What/who the ? |
| WTG | Way to go! |
| WTGP? | Want to go private? |
| WU? | What's up? |
| WUF? | Where are you from? |
| WYSIWYG | What you see is what you get |