USP

from The Free On-line Dictionary of Computing (8 July 2008)

unique sales point
USP

   <product> (USP) A feature that the salesman hopes will
   convince you to buy his product instead of another.

   (1999-10-21)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

USP
       Universal Storage Platform (HDS)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

USP
       User Stack Pointer