404     I haven't a clue
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
BAS Big a** smile
BBIAB Be back in a bit
BBL Be back later
BBN Bye bye now
BBS Be back soon
BEG Big evil grin
BF Boy friend
BFD Big f***ing deal
BFN Bye for now
BG Big grin
BIBO Beer in, beer out
BIOYIOP Blow it out your
I/O port
BL Belly laughing
BMGWL Busting my gut with laughter
BOTEC Back-of-the-envelope calculation
BRB Be right back
BTA But then again...
BTDT Been there, done that
BTW By the way
BWL Bursting with laughter
BWTHDIK But what the heck do I know...?
CICO Coffee in, coffee out
C&G Chuckle and grin
CNP Continued in next post
CRB Come right back
CRBT Crying real big tears
CU See you
CUL See you later
CUL8ER See you later
CYA See ya
CYA Cover your a**
CYO See you online
DBA Doing business as
DFLA Disenhanced
four-letter acronym (that is, a TLA)
DL Dead link
DLTBBB Don't let the bed bugs bite
DIKU Do I know you?
DITYID Did I tell you I'm distressed?
DOM Dirty old man
DOS Dozing off soon
DQMOT Don't quote me on this
DTRT Do the right thing
DWB Don't write back
EG Evil grin
EMFBI Excuse me for butting in
EMSG E-mail message

NRN No response necessary
OIC Oh, I see
OLL Online love
OMG Oh my goodness
OTF Off the floor
EOM End of message
EOT End of thread (meaning: end of discussion)
ETLA Extended three-letter acronym
F2F Face to face
FAQ Frequently-ask question(s)
FC Fingers crossed
FISH First in,still here
FLA Four-letter acronym
FMTYEWTK Far more than you ever wanted to know
FOMCL Falling off my chair laughing
FTBOMH From the bottom of my heart
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
GIGO Garbage in, garbage out
GD&R Grinning, ducking, and running
GF Girlfriend
GFN Gone for now
GGP Gotta go pee
GIWIST Gee, I wish I'd said that
GL Good luck
GMAB Give me a break
GMTA Great minds think alike
GOL Giggling out loud
GTRM Going to read mail
GTSY Glad to see you
H&K Hug and kiss
HAGN Have a good night
HAND Have a nice day
HHIS Hanging head in shame
HIG How's it going
HT Hi there
HTH Hope this helps
HUB Head up butt
IAC In any case
IAE In any event
IANAL I am not a lawyer (but)
IC I see
IGP I gotta pee
IHA I hate acronyms
IHU I hear you
IIRC If I recall/remember
ILU or ILY I love you
IM Immediate message
IMCO In my considered opinion 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
IMS I am sorry
IOW In other words
IPN I'm posting naked IRL In real life (that is, when not chatting)
ITIGBS I think I'm going to be sick

TANSTAAFL There ain't no such thing as a free lunch
TCOY Take care of yourself IWALU I will always love you
IYSWIM If you see what I mean
J4G Just for grins
JBOD Just a bunch of disks (like redundant array of independent disks, etc.)
JIC Just in case
JK Just kidding
JMO Just my opinion
JTLYK Just to let you know
KISS Keep it simple stupid
KIT Keep in touch
KOTC Kiss on the cheek
KOTL Kiss on the lips
KWIM? Know what I mean?
L8R Later
L8R G8R Later gator
LD Later, dude
LDR Long-distance relationship
LHO Laughing head off
LLTA Lots and lots of thunderous applause
LMAO Laughing my a** off
LMSO Laughing my socks off
LOL Laughing out loud
LRF Little Rubber Feet (the little pads on the bottom of displays and other equipment)
LSHMBH Laughing so hard my belly hurts
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
LUWAMH Love you with all my heart
LY Love ya
LY4E Love ya forever
MorF Male or female
MOSS Member of the same sex MOTOS Member of the opposite sex
MTF More to follow
MUSM Miss you so much
MM Mental moment (thinking)
NADT Not a darn thing
NFW No freaking way
NIFOC Naked in front of computer
NP or N/P No problem