MOPAC 7 and MOPAC 93

[jstewart : at : fai.com (Dr. James Stewart)]

 Kay Kreidler asks:
 > What are the differences between MOAPC 7.0 and MOAPC93? I thought, you can
 > calculate pKa-values with MOPAC 7.0, but we got a copy by QCPE and it
 > seems, that this is not true. Does anyone know, how to get MOAPC93 and
 > what its price is (I think it's commercial).
 >
 To reiterate:
 MOPAC 7 is public domain software.
 MOPAC 93 is copyrighted software.
 MOPAC 7 is intended for use by software developers ONLY.
         It is NOT intented to be used in production work.
 Both MOPAC 7 and MOPAC 93 can be obtained through the QCPE.
 MOPAC 7 is available at the standard QCPE cost.
 MOPAC 93 is available at the standard QCPE cost for non-profit organizations
 (academic institutions, for example).
 MOPAC 93 is available for $2,000 to profit making orgainizations.
 pKa can be calculated by both MOPAC 7 and MOPAC 93.
 pKa is calculated using the COSMO solvation model.
 Everyone who gets MOPAC 93 must sign an end-user agreement.
 James J. P. Stewart