OT Off Topic
OTOH On the Other Hand
OWTTE Or Words To That Effect
OZ stands for "Australia"
PEBCAK Problem Exists Between Chair And Keyboard
PIMP Peeing In My Pants
PITA Pain In The Ass
PLS Please
PMFJI Pardon Me For Jumping In
PO Piss Off
POV Point of View
RBTL Read Between The Lines
RL Real Life
RLF Real Life Friend
RMLB Read My Lips Baby
RMMM Read My Mail Man!
RN Right Now!
ROTFL Rolling On The Floor Laughing
ROTFLMAO Rolling On The Floor Laughing My Ass Off
ROTM Right On The Money
RSN Real Soon Now
RTFM Read The F***ing Manual
RTK Return To Keyboard
RTM Read The Manualliuxuepaper.com