PSI/88 Version 1.0 by W. L. Jorgensen & D. L. Severance To plot wavefunctions in three dimensions from semi-empirical and most popular ab initio basis sets. Valence semi-empirical, STO-3G, 3-21++G(*) and 6-31++G(d,p) basis sets are implemented for atoms H-Ar. WWW: http://zarbi.chem.yale.edu/products/psi88/index.shtml On-line manual is available at this web site. You can also download the source code of psi88 from the above site as a ``psi88.tar.gz''. When you do ungzip and untar this archive, you will obtain some documents and the ``psi88.tar.Z'' file which is required at this port.