Hi Tina,
A friend sent this to me a long time ago when I was just starting out on the WWW. I rarely use most of them, but here they are FYI
Online Abbreviations:
AFAIK = As far as I know
AFK = Away from keyboard
ASAP = As soon as possible
B4N = Bye for now
BF = Boy friend
BRB = Be right back
BTA = But then again...
BTDT = Been there, done that
BTW = By the way
C&G = Chuckle and grin
CUL = See you later
CUL8ER = See you later
CYA = Cover your backside
CYO = See you online
DH = Dear husband
DTRT = Do the right thing
EMFBI = Excuse me for butting in
EOM = End of message
EOT = End of thread (meaning: end of discussion)
FAQ = Frequently-ask question(s)
FUD = Fear, Uncertainty, and Doubt
FWIW = For what it's worth
FYI = For your information
GF = Girlfriend
GG = Genetic girl
GL = Good luck
H&K = Hug and kiss
IAC = In any case
IAE = In any event
IANAL = I am not a lawyer (but)
IMHO = In my humble opinion
IM = Instant message
IMO = In my opinion
IOW = In other words
J4G = Just for grins
KISS = Keep it simple stupid
KIT = Keep in touch
KOTC = Kiss on the cheek
KOTL = Kiss on the lips
KWIM? = Know what I mean?
LMAO = Laughing my a** off
LOL = Laughing out loud
LULAB = Love you like a brother
LULAS = Love you like a sister
LUWAMH = Love you with all my heart
MorF = Male or female
NP or N/P = No problem
NRN = No response necessary
OMG = Oh my God
OTOH =On the other hand
PCMCIA = People can't master computer industry acronyms
PITA = Pain in the backside
PM = Private message
QT = Cutie
RL = Real life (that is, when not chatting)
ROR = Raffing out roud (Engrish for "laughing out loud")
ROTFL = Rolling on the floor laughing
SO = Significant other
SUP = What's up
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
TTFN = Ta-Ta for now (

Kyra's fav.)
TTYL = Talk to you later
WTFO = What the F***! Over!
WTG = Way to go!
WYSIWYG = What you see is what you get
YMMV = Your mileage may vary.
I hardly ever look at them anymore. I found my favs. and stick with 'em. You can pretty much abbreviate anything online.
Hugs,
KYra