AFAIK		as far as I know 
ACK?		acknowledge 
ACK! or NACK!		response to ack? (Yes, I'm here! or Nope) 
AFK		away from keyboard 
ASAP		as soon as possible 
ASL		age, sex, and location 
BAK		back at the keyboard 
BCNU		be seeing you 
BBN		bye bye now 
BBS		bulletin board system 
BRB		be right back 
BTW		by the way 
BWL		bursting with laughter 
C&G		chuckle & grin 
CID		crying in disgrace 
CNP		continued in my next post 
CP		chat post 
CSG		chuckle snicker grin 
CYA		see you (see ya) 
CYAL8R		see you later (see ya later) 
DAY		dreamed about you 
DLTBBB		don't let the bed bugs bite 
EMSG		email message 
FYEO		for your eyes only 
FYI		for your information 
FWIW		for what it's worth 
GFN		gone for now 
GG		got to go (gotta go) 
GLSY		glad to see you 
GMTA		great minds think alike 
G/S?		are you gay or straight? 
H&K		hugs & kisses 
HABU		have a better 'un 
HAGN		have a good night 
HAGU		have a good 'un 
HHIS		hanging head in shame 
HOF		hall of fame 
IC		i see 
ICQ		i seek you 
IGP		i got to pee (i gotta pee) 
IH8U		i hate you 
ILY		i love you 
IM		instant message 
IMAO		in my arrogant opinion 
IMD14U		i'm the one for you 
IMO		in my opinion 
IMHO		in my humble opinion 
IRL		in real life 
IWALU		i will always love you 
IWUTK		i want you to know 
JMO		just my opinion 
JTLYK		just to let you know 
K		kiss 
KIT		keep in touch 
KOC		kiss on cheek 
KOL		kiss on lips 
L8R		later 
L8R G8R		later 'gater 
LHM		lord, help me 
LHU		lord, help us 
LOL		laugh out loud 
LSHMBB		laughing so hard my belly is bouncing 
LSHMBH		laughing so hard my belly hurts 
LSHIPMP		laughing so hard I pee'd in my pants 
LTNS		long time no see 
LTNT 		long time no talk 
LTS		laughing to self 
LUWAMH		love you with all my heart 
LY		love you 
MAY		mad about you 
M/F?		are you male or female? 
NTMY		nice to meet you 
OIC		oh, I see 
OL		old lady (significant other) 
OM		old man (significant other) 
OMG		oh, my god! 
OTTOMH		off the top of my head 
PDS		please don't shoot 
PM		private message 
PMJI		pardon my jumping in 
POAHF		put on a happy face 
QSL 		reply 
QSO		conversation 
QT		cutie 
QTP		cutie pie 
ROTF		rolling on the floor 
ROTFL		rolling on the floor laughing 
ROTFLAPMP		ROTFL and peeing in my pants 
ROTFLMAO 		ROTFL my ass off 
ROTFLWTIME		ROTFL with tears in my eyes 
ROTFLUTS 		ROTFL and unable to speak 
RSN		real soon now 
SETE		smile ear to ear 
SO		significant other 
SWAK		sealed with a kiss 
SWJ		screaming with joy 
SWL 		screaming with laughter 
SYS		see you soon 
TA 		thanks again 
TAL 		thanks a lot 
TAT		turnaround time 
TOY		thinking of you 
TPTB		the powers that be 
TTFN		ta-ta for now 
TTYL		talk to you later 
TFVMHR		thanks for visiting my humble room 
WB		welcome back 
WOB		without a boyfriend 
WOG		without a girlfriend 
WTG		way to go 
WTH 		what/who the heck... 
WYSIWYG		what you see is what you get 
Y4E 		young forever 
YBS 		you'll be sorry 
YG 		young gentleman 
YL 		young lady 
YM		young man 
YMMV		your mileage may vary (value to user may vary)