Another popular way of communicating on the Internet is to use acronyms, or abbreviations of words, instead of typing the whole phrase. These are also used for mobile phone messaging (or texting) such as the SMS service on the Bush Internet portal. They may not always be polite! Here are some of the most commonly used, but if you want to learn more, you can get books on Text Messaging or Netiquette at WHSmith:

2L8	Too late
AAMOF	As a matter of fact
AFAIK	As far as I know
B4N	Bye for now
BRB	Be right back
BTW	By the way
CMIIW	Correct me if I'm wrong
CUL	See you later
FAQ	Frequently Asked Questions
FC	Fingers Crossed
FUA	Frequently Used Acronyms
FWIW	For what it's worth
FYI	For Your Information
GR8	Great
HTH	Hope this Helps
IAC	In any case
IAE	In any event
IKWUM	I know what you mean
IMCO	In my considered opinion
IMHO	In my humble opinion
IMO	In my opinion
IOW	In other words
KWIM	Know what I mean
L8TR	Later / See you later
LOL	Laughing out loud
NBIF	No basis in fact
NRN	No Reply Necessary
OTOH	On the other hand
RL	Real life
ROFL	Rolling on floor laughing
RSN	Real Soon Now
SITD	Still in the dark
TANSTAAFL	There 'Ain't No Such Thing As A Free Lunch
TIA	Thanks In Advance
TIC	Tongue in cheek
TLA	Three Letter Acronym (such as this)
YMMV	Your Mileage May Vary