Useful shorthand expressions

AFAICS = As far as I can see
AFAIK = As far as I know
AKA = Also known as
BTDT = Been there, done that
BTW = By the way
FWIW = For what it's worth
FYI = For your information
HAND = Have a nice day
IIRC = If I recall correctly
IMHO = In my humble opinion
IMNSHO = In my not so humble opinion
IMO = In my opinion
IYKWIM = If you know what I mean
KUTGW = Keep up the good work
LOL = Laughing out loud
OTOH = On the other hand
PEBCAK = Problem exists between chair and keyboard
ROTFL = Rolling on the floor laughing