| ADN | Any day now |
| AFAIK | As far as I know |
| AFK | Away from keyboard |
| ARE | Acronym-rich environment |
| ASAP | As soon as possible |
| A/S/L? | Age/sex/location? |
| B4N | Bye for now |
| BAK | Back at the keyboard |
| BBIAB | Be back in a bit |
| BBL | Be back later |
| BEG | Big evil grin |
| BFD | Big f***ing deal |
| BFN | Bye for now |
| BG | Big grin |
| BIOYIOP | Blow it out your I/O port |
| BL | Belly laughing |
| BOTEC | Back-of-the-envelope calculation |
| BRB | Be right back |
| BTA | But then again… |
| BTW | By the way |
| BWTHDIK | But what the heck do I know…? |
| CU | See you |
| CUL | See you later |
| CUL8ER | See you later |
| CYA | Cover your ass |
| 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 |
| FOAD | F*** off and die (used during flaming) |
| FOMCL | Falling off my chair laughing |
| FUBAR | F***ed up beyond all repair or recognition |
| 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 |
| GL | Good luck |
| GL2E | Good luck to everyone |
| GLA | Good luck all |
| GMTA | Great minds think alike |
| GOL | Giggling out loud |
| GTRM | Going to read mail |
| HAND | Have a nice day |
| 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 |
| IMO | In my 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 |
| KOTC | Kiss on the cheek |
| 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 |
| LRF | Little Rubber Feet (the little pads on the bottom of displays and other equipment) |
| LTM | Laugh to myself |
| LTNS | Long time no see |
| LTR | Long-term relationship |
| LULAB | Love you like a brother |
| LULAS | Love you like a sister |
| MorF | Male or female |
| MOSS | Member of the same sex |
| MOTOS | Member of the opposite sex |
| MUSM | Miss you so much |
| NFG | No f*****g good |
| NFW | No feasible way or no f*****g way |
| NIFOC | Naked in front of computer |
| NP or N/P | No problem |
| NRN | No response necessary |
| OIC | Oh, I see |
| OLL | Online love |
| OTF | Off the floor |
| OTOH | On the other hand |
| OTTOMH | Off the top of my head |
| PANS | Pretty awesome new stuff (as opposed to "POTS") |
| PCMCIA | People can't master computer industry acronyms |
| PDA | Public display of affection |
| PEBCAK | Problem exists between chair and keyboard |
| PIBKAC | Problem is between keyboard and chair |
| PITA | Pain in the ass |
| PMFJIB | Pardon me for jumping in but… |
| ::POOF:: | Goodbye (leaving the room) |
| POS | Piece of s**t |
| POTS | Plain old telephone service |
| PU | That stinks! |
| RL | Real life (that is, when not chatting) |
| ROR | Raffing out roud (English for "laughing out loud") |
| ROTFL (or ROFL) | Rolling on the floor laughing |
| ROTFLMAO | Rolling on the floor laughing my a** off |
| ROTFLMAOWPIMP | Rolling on the floor laughing my a** off while peeing in my pants |
| ROTFLMBO | Rolling on the floor laughing my butt off |
| RPG | Role-playing games |
| RSN | Real soon now |
| RTFM | Read the f***ing manual |
| RYO | Roll your own (write your own program; derived from cigarettes rolled yourself with tobacco and paper) |
| S4L | Spam for life (what you may get when you become someone's customer or client) |
| SEG | S***-eating grin |
| SF | Surfer-friendly (low-graphics Web site) |
| SNAFU | Situation normal, all f***ed up |
| SO | Significant other |
| SOL | Smilling out loud or sh*t out of luck |
| SOMY | Sick of me yet? |
| STFW | Search the f*****g Web |
| STW | Search the Web |
| SWAG | Stupid wild-a** guess |
| TAFN | That's all for now |
| TANSTAAFL | There ain't no such thing as a free lunch |
| 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 |
| TMI | Too much information |
| TOPCA | Til our paths cross again (early Celtic chat term) |
| TPTB | The powers that be |
| TTFN | Ta-Ta for now |
| TTT | Thought that, too (when someone types in what you were about to type) |
| TTYL | Talk to you later |
| TU | Thank you |
| UAPITA | You're a pain in the ass |
| UW | You're welcome |
| VBG | Very big grin |
| VBSEG | Very big s***-eating grin |
| WDALYIC | Who died and left you in charge? |
| WFM | Works for me |
| WIBNI | Wouldn't it be nice if |
| WT? | What/who the ? |
| WTFO | What the F***! Over! |
| 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 |
| YGBSM | You gotta be s***tin' me! |
| YMMV | Your mileage may vary. |
| AOB | Any Other Business |
| AS | After-Sales Service |
| ASAP | As Soon As Possible |
| ATP | Acceptance Test Procedure |
| CAO | Chief Administrative Officer |
| CC | Carbon Copy |
| FCC | First Carbon Copy |
| BCC | Blind Carbon Copy |
| CDO | Chief Development Officer |
| CEO | Chief Executive Officer |
| CF | Commercial Film |
| CFO | Chief Financial Officer |
| CHO | Chief Health Officer |
| CIO | Chief Information Officer |
| CKO | Chief Knowledge Officer |
| COB | Close Of Buisiness |
| COD | Cash (또는 Collect) on Delivery |
| COO | Chief Operating Officer |
| CTO | Chief Technology Officer |
| CV | Curriculum Vitae |
| DDD | Direct Distance Dialing |
| DID | Direct Inward Dialing |
| DIY | Do It Yourself. |
| DM | Direct Mail |
| DOD | Direct Outward Dialing |
| FAX | Facsimile |
| FYI | For Your Information |
| Inc. | Incorporated |
| IR | Investor Relations |
| K | a thousand |
| LC | Letter of Credit |
| LOI | Letter of Intent |
| Ltd. | Limited |
| mobile | 모바일 |
| MOU | Memorandum of Understanding |
| MOUS | Microsoft Office User Specialist |
| N/A | Not Applicable |
| OHP | Overhead Projector |
| OJT | On-the-Job Training |
| OT | Overtime |
| PM | Project Manager |
| RFI | Ready for Infrastructure |
| RFP | Request for Proposal |
| RSVP | Repondez S'il Vous Plait |
| R&D | Research and Development |
| TBD | To Be Decided |
| TFT | Task Force Team |
| TGIF | Thank God. It's Friday. |
| TM | trademark |
| trial version | 트라이얼 버전 |
| VAT | Value Added Tax |
| w/o | without |
| pps | Packet per second |