an one percent, and
<LI> the ability to vectorize integral computation over many thousands
     of atomic quartets.
</UL>

 <P> All calculations will benefit from the vectorization of integral
evaluation, but most calculations benefit by only 10% from the
reduction in communication.  However, the time to solution for our
ZSM-5 zeolite fragment test-case (389 atoms, 2053 function, STO-3G
basis, no symmetry) on 64 nodes of the IBM SP2 was reduced from over
40 hours to less than six.  This is because the minim