Slappy,
Here are some others:
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4ever = Forever
AKA or a.k.a. = Also Known As
ANFAWFOS = And Now For A Word From Our Sponsors
ANFAWFOWS = And Now For A Word Word From Our Web Sponsor
ANFSCD = And Now For Something Completely Different
ASAP = As Soon As Possible
AWOL = Absent Without Leave
AYCOOYM = Are You Completely Out Of Your Mind
AYOR = At Your Own Risk
AYPI = And Your Point Is
AYSOS = Are You Stupid Or Something
B/C = Because
B4 = Before
B4N = Bye For Now
BAD = Bad As Designed
BAIC = Boy Am I Confused
BC = Because
BITD = Back In The Day
BKA = Better Known As
BLTN = Better Late Than Never
BOC = But Of Course
BOT = Back On Topic
BRGDS = Best Regards
BTDT = Been There Done That
BTDTGTS = Been There Done That Got the T-Shirt
BTFT = Been There Fixed That
BTHOM = Beats The Hell Outta Me
BTW = By The Way
BYOB = Bring Your Own Booze
BYORL = Bring Your Own Rocket Launcher
C4N = Ciao For Now
CFD = Call For Discussion
CIAO = Goodbye (in Italian)
CID = Consider It Done
COTFL = Crawling On The Floor Laughing
CRAFT = Can't Remember a F***ing Thing
CRAWS = Can't Remember Anything Worth A Sh**
CRS = Can't Remember Sh**
CUL = Catch You Later
CUL8R = See You Later
CYA = See Ya or Cover Your Ass
CYAL8R = See You Later
CYL = See You Later
DBAI = Designed By An Idiot
DBEYR = Don't Believe Everything You Read
DD = Due Diligence
DEGT = Don't Even Go There
DETI = Don't Even Think It
DGT = Don't Go There
DHYB = Don't Hold Your Breath
DIIK = Damned If I Know
DINK = Dual Income No Kids
DIY = Do It Yourself
DKDC = Don't Know Don't Care
DQYDJ = Don't Quit Your Day Job
DSH = Desperately Seeking Help
DTHT = Delighted To Hear That
DTRT = Do The Right Thing
DWISNWID = Do What I Say Not What I Do
DWOL = Drunk While On Line
EZ = Easy
F2F = Face-To-Face or Flesh-To-Flesh
FAQL = Frequently Asked Questions List
FAWC = For Anyone Who Cares
FOC = Free Of Charge
FOTCL = Falling Off The Chair Laughing
FUBAR = F***ed Up Beyond All Recognition
FWIW = For What It's Worth
FY = F*** You
FYA = For Your Amusement
FYE = For Your Entertainment
FYEO = For Your Eyes Only
FYG - For Your Guidance
FYI = For Your Information
FYM = For Your Misinformation
G1 =Good One
GAFIA = Get Away From It All
GAL = Get A Life
GIWIST = Gee, I Wish I'd Said That
GJ = Good Job
GL = Good Luck
GMAB = Give Me A Break
GMTA = Great Minds Think Alike
GR8 = Great
GRRRR = it means Growling
HAND = Have A Nice Day
HMP = Help Me Please
ID10T = Idiot
IDK = I Don't Know
ILSHIBAMF = I Laughed So Hard I Broke All My Furniture
IMAO = In My Arrogant Opinion
IMBO = In My Bloody Opinion
IMBW = I May Be Wrong
IMCAO = In My Completely Arrogant Opinion
IMCO = In My Considered Opinion
IME = In My Experience
IMHBCO = In My Humble But Correct Opinion
IMHO = In My Humble Opinion
IMNSCO = In My Not So Considered Opinion
IMNSHO I= n My Not So Humble Opinion
IMO = In My Opinion
IMOBIHO = In My Occasionally But Infrequently Humble Opinion
IMOBO = In My Own Biased Opinion
IMOHO = In My Occasionally Humble Opinion
IMPE = In My Personal/Previous Experience
IMS = I Am Sorry
IMVHO = In My Very Humble Opinion
INL = I'm Not Laughing
IOH = I'm Outta Here
IOW = In Other Words
ITA = I Totally Agree
IWBIWISI = I Will Believe It When I See It
IYD = In Your Dreams
JMO = Just My Opinion
KISS = Keep It Simple Stupid
KWIM = Know What I Mean
L8R = Later
L8R G8R = Later 'Gater
LMAO = Laughing My Ass Off
LTIP = Laughing Till I Puke
LTR = Later
MIL = Mother In Law
NIME = Not In My Experience
NPNG = No Pain No Gain
OAO = Over And Out
OATUS = On A Totally Unrelated Subject
PCMCIA = People Can't Memorize Computer Industry Acronyms
Q&A = Questions & Answers
RAW = Rules As Written
RBTL = Read Between The Lines
RE = Regarding
RGDS = Regards
RIP = Rest In Peace
ROFL = Rolling On the Floor Laughing
RTM or RTFM = Read The Manual - or - Read The F*#king Manual
RU = Are You?
SOL = Sh** Out of Luck
TGIF = Thank God It's Friday
THX or TX or THKS = Thanks
TMI = Too Much Information
WTF = What the F***
WTH = What The Hell?
YMMV = Your Mileage May Vary
ZAV =Zero Added Value