SMS users all over the world use abbreviations and smiley's in their mobile messages. Here is a reference dictionary if you need to refresh your memory.

Abbreviations

AFAIK: As Far As I Know
AFK: Away From Keyboard
ASAP: As Soon As Possible
ASL: Age, Sex, Location
ATK: At The Keyboard
ATM: At The Moment
A3: Anytime, Anywhere, Anyplace

BAK: Back At Keyboard
BBL: Be Back Later
BBS: Be Back Soon
BFN/B4N: Bye For Now
BRB: Be Right Back
BRT: Be Right There
BTW: By The Way
B4N: Bye For Now

CU: See You
CUL8R: See You Later
CYA: See You

FAQ: Frequently Asked Questions
FC: Fingers Crossed
FWIW: For What It's Worth
FYI: For Your Information

GAL: Get A Life
GG: Good Game
GMTA: Great Minds Think Alike
GR8: Great!
G9: Genius

IC: I See
ICQ: I Seek you (also a chat program)
ILU: I Love You
IMHO: In My Honest/Humble Opinion
IMO: In My Opinion
IOW: In Other Words
IRL: In Real Life

KISS: Keep It Simple, Stupid

LDR: Long Distance Relationship
LMAO: Laugh My A.. Off
LOL: Laughing Out Loud
LTNS: Long Time No See
L8R: Later

MTE: My Thoughts Exactly
M8: Mate

NRN: No Reply Necessary

OIC: Oh I See

PITA: Pain In The A..
PRT: Party
PRW: Parents Are Watching

QPSA? Que Pasa?

ROFL: Rolling On The Floor Laughing
ROFLOL: Rolling On The Floor Laughing Out Loud
ROTFLMAO: Rolling On The Floor Laughing My A.. Off

SK8: Skate
STATS: Your sex and age

THX: Thank You
TTFN: Ta-Ta For Now!
TTYL: Talk To You Later

U: You
U2: You Too
U4E: Yours For Ever

WB: Welcome Back
WTF: What The F...
WTG: Way To Go!
WUF: Where Are You From?
W8: Wait...

7K: Sick:-D Laugher