The Collaborative International Dictionary of English v.0.48:

Apo \Ap"o\ [Gr. ?. See Ab-.]
   A prefix from a Greek preposition. It usually signifies from,
   away from, off, or asunder, separate; as, in apocope (a
   cutting off), apostate, apostle (one sent away), apocarpous.
   [1913 Webster]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

APO
       Advanced Planner and Optimizer (SAP, SCM)