F - Fit 
HF - high fit 
SF - slip fit 
F/C - Fit Check 
FC - fit check 
DF - Drive Fit 
PF - Press fit 
PRFT - press fit 
LOF - Lack Of Fit 
AF - average fit 
F2F - Fit to Fuck 
RF - running fit 
ef - epileptic fit 
FFF - full face fit 
GOF - goodness-of-fit 
AHF - Acute Hissy Fit 
BFS - best fit sphere 
GF - Goodness-of-Fit 
FFB - Fit For Breeding 
FFM - First Fit Method 
IF - Interference Fit 
NFI - Normed Fit Index 
F3/FFF - Form-Fit-Function 
FFF - Form Fit Function 
LBF - LEVEL OF BEST FIT 
LSF - least-squares fit 
BFE - Best-Fit Ephemeris 
FIFO - Fit In or Fuck Off 
PFC - Press Fit Condylar 
RFE - Relative Fit Error