Commonly used Abbreviations
TFM - Tamil Film Music
DF - Discussion Forum
SOTD - Song Of The Day
IR - Ilayaraja
ARR - A. R. Rehman
MSV/TKR - Viswanathan-Ramamoorthy
KVM - K. V. MahadEvan
GR - G. Ramanathan
GA - Gangai Amaran
SMS - S. M. Subbaiah Naidu
KJY/KJJ - K. J. Yesudoss
TMS - TMS :)
SPB - SPB :)
PBS - P. B. Sreenivas
AMR - A. M. Raja
UK - Unni Krishnan
HH - Hariharan
MV - Malaysia VasudEvan
JC - Jayachandran
PS - P. Susheela
SJ - S. Janaki
KSC - K. S. Chitra
AB - Asha Bhonsle
VM - Vairamuthu
PB - Palani Bharathi
BTW - By the way
IMO - In my opinion
IMHO - In my humble opinion
NOM - No offense meant
OTOH - On the other hand
TIA - Thanks in Advance
AFAIK - As Far As I Know
IIRC - If I Remember Correctly
BGM - Background music
ROTFL - Rolling on the floor laughing.
Another famous one, NOV - Namma ooru velan.