Source : WordNet®

prep
     n : preparatory school work done outside school (especially at
         home) [syn: {homework}, {preparation}]

Source : Free On-Line Dictionary of Computing

PREP
     
        1. (PReP) {PowerPC Reference Platform}.
     
        2. (PREP) PRogrammed Electronics Patterns.  Language for
        designing {integrated circuit}s.  ["Computer Assisted Mask
        Production", R.L. Rosenfeld, Proc IEEE 57(9) Sep 1969].