We have all gotten them at onetime or another, those e-mails that have those annoying letter combinations. Here is a pretty good list of what they mean:
AFAIC As Far As I'm Concerned
AISI As I See It
ASAP As Soon As Possible
B4 Before
BOT Back On Topic
BTW By The Way
CIAO Goodbye
CIS CompuServe Information Service
CUL Catch You Later/See You Later
CUL8R See You Later
CWYL Chat With You Later
DBEYR Don't Believe Everything You Read
FE Fatal Error
FTL Faster Than Light
FYI For Your Information
FYM For Your Misinformation
HAK Hugs And Kisses
HHOK Ha Ha, Only Kidding
HHO1/2K Ha Ha, Only Half Kidding
HTH Hope This Helps
HUA Heads Up, Ace
IAC In Any Case
IAE In Any Event
IITYWTMWYLMA If I Tell You What This Means Will You Leave Me Alone
IIWM If It Were Me
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
ISP Internet Service Provider
KISS Keep It Simple Stupid
L8R Later
LD Long Distance
LLTA Lots And Lots Of Thunderous Applause
LOL Laughing Out Loud
NRN No Reply Necessary
OATUS On A Totally Unrelated Subject
OATIS On A Totally Irrelevant Subject
OMIK Open Mouth, Insert Keyboard
ONNA Oh No, Not Again
OTOH On The Other Hand
OTSH On The Same Hand
RMM Read My Mail
ROTFL Rolling On The Floor Laughing
ROTM Right On The Money
RSN Real Soon Now
RTFM Read The Fucking Manual (or Message)
TFN Thanks For Nothin'
TIA Thanks In Advance
TLA Three Letter Acronym (such as this)
TM Trust Me
TWHAB This Won't Hurt A Bit
WEB World Wide Wait
WMG Wheres My Glasses
WTHDTIM What The Hell Do These Initials Mean
YGBK You Gotta Be Kiddin'
AFAIC As Far As I'm Concerned
AISI As I See It
ASAP As Soon As Possible
B4 Before
BOT Back On Topic
BTW By The Way
CIAO Goodbye
CIS CompuServe Information Service
CUL Catch You Later/See You Later
CUL8R See You Later
CWYL Chat With You Later
DBEYR Don't Believe Everything You Read
FE Fatal Error
FTL Faster Than Light
FYI For Your Information
FYM For Your Misinformation
HAK Hugs And Kisses
HHOK Ha Ha, Only Kidding
HHO1/2K Ha Ha, Only Half Kidding
HTH Hope This Helps
HUA Heads Up, Ace
IAC In Any Case
IAE In Any Event
IITYWTMWYLMA If I Tell You What This Means Will You Leave Me Alone
IIWM If It Were Me
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
ISP Internet Service Provider
KISS Keep It Simple Stupid
L8R Later
LD Long Distance
LLTA Lots And Lots Of Thunderous Applause
LOL Laughing Out Loud
NRN No Reply Necessary
OATUS On A Totally Unrelated Subject
OATIS On A Totally Irrelevant Subject
OMIK Open Mouth, Insert Keyboard
ONNA Oh No, Not Again
OTOH On The Other Hand
OTSH On The Same Hand
RMM Read My Mail
ROTFL Rolling On The Floor Laughing
ROTM Right On The Money
RSN Real Soon Now
RTFM Read The Fucking Manual (or Message)
TFN Thanks For Nothin'
TIA Thanks In Advance
TLA Three Letter Acronym (such as this)
TM Trust Me
TWHAB This Won't Hurt A Bit
WEB World Wide Wait
WMG Wheres My Glasses
WTHDTIM What The Hell Do These Initials Mean
YGBK You Gotta Be Kiddin'