This is a port of MOPAC7, semi-empirical (MNDO, AM1, PM3, MINDO/3) molecular orbital calculation. Public domain version of MOPAC93. This port uses Linux patch. Minematsu makes FreeBSD patchs, and Miyamoto is porting them. And enlarging max atoms as MAXHEV=50 & MAXLIT=50. Potring to 4.0-CURRENT (__FreeBSD_version == 400005) and later versions have been assisted greatly by Glenn Johnson , thanks a lot ! He found that an unusable binary was produced using g77 at FreeBSD 4, then it is recommended to use f2c/cc. -- rmiya