leaprc.ff86   -- Weiner et al all atom: parm91x.dat + "91" prep files
leaprc.ff94   -- Cornell et al: parm94.dat + 94 prep files
leaprc.ff96   -- Cornell et al: parm96.dat + 94 prep files
leaprc.ff98   -- Cornell et al: parm98.dat + 94 prep files
leaprc.ff99   -- parm99.dat + 94 prep files = parm99 additive, no lone pairs
leaprc.ff02   -- parm99.dat + 00 prep files = parm99, nonadditive, no lone pairs
leaprc.ff02EP -- same as ff00, but with lone pairs, non-additive
leaprc.gaff   -- for organic molecules, with the "general Amber force field"
leaprc.ME     -- from Yong Duan, using solvated charges, new torsions

Above files all assume that nucleic acids by default are DNA.  To assume
RNA, use files with "rna" in the file name.

Older force fields, no longer recommended for *general* use, are in the
subdirectory "oldff".
