AFAIK As Far as I Know
AFK Away From Keyboard
AKA Also Know as
ASAP As Soon as Possible
B4 Before
BAK Back at Keyboard
BBL Be Back Later
BBS Be Back Soon
BRB Be Right Back
BTDT Been There Done That
BTW By The Way
CFV Call for Votes
CUL See You Later
EOM End of Message
F2F Face to Face
FAQ Frequently Asked Question
FC Fingers Crossed
FWIW For What It's Worth
FYA For Your Amusement
FYI For Your Information
GA Go Ahead
HIWTH Hate it When That Happens
GR&D Grinning, Running & Ducking
IAE In Any Event
IANAL I Am Not a Lawyer
IDK I Don't Know
IMCO In My Considered Opinion
IMHO In My Humble Opinion
IMNSHO In My Not So Humble Opinion
IMO In My Opinion
IOW In Other Words
IRL In Real Life
IYKWIM If You Know What I mean
JAM Just a Minute
JASE Just Another System Error
J/K Just Kidding
KOTC Kiss on the Cheek
L Laugh
L8R Later
LOL Laugh Out Loud
NNTP Network News Transport Protocol
NRN No Reply Necessary
OBTW Oh, by the Way
OIC Oh, I see
OTOH On The Other Hand
OT Off Topic
PLZ Please
PMFJI Pardon Me for Jumping in
ROFL Rolling on The Floor Laughing
RSN Real Soon Now
SITD Still In The Dark
SYL See You Later
TGIF Thank God it's Friday
TIA Thanks in Advance
TIC Tongue in Cheek
TLA Three Letter Acronym
TNX Thanks
TTFN Ta Ta For Now
TTYL Talk to You Later
WB Welcome Back
WRT With Regard to
WTG Way to Go
YMMV Your Mileage May Vary