I occasionally use abbreviations, particularly in formulas.
These are some of the more common ones.
AST Assists
BK Blocked Shots (same as BLK)
BLK Blocked Shots (same as BK)
Def. Defensive
DefR Defensive Rebounds
DQ Disqualifications (number of times fouled out)
DR Defensive Rebounds
FF Flagrant Fouls
FG Field goals made (same as FGM)
FG% Field goal percentage (same as FGP)
FG3A Three-point field goals attempted
FG3M Three-point field goals made
FGA Field goals attempted
FGM Field goals made (same as FG)
FGP Field goal percentage (same as FG%)
FL% Floor percentage
FT Free throws made (same as FTM)
FT% Free throw percentage (same as FTP)
FTA Free throws attempted
FTM Free throws made (same as FT)
FTP Free throw percentage (same as FT%)
G Games Played (same as GP)
GP Games Played (same as G)
GS Games Started
HI High point game
MIN Minutes (same as MP)
MP Minutes Played (same as MIN)
Off. Offensive
OR Offensive Rebounds
PF Personal Fouls
Poss. Possessions
PTS Points
REB Rebounds, usually total (TR)
Rtg Rating, Points per 100 possessions
ST Steals (same as STL)
STL Steals (same as ST)
TR Total Rebounds