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

DDP
       Datagram Delivery Protocol (AppleTalk)


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

DDP
       Distributed Data Processing


The Free On-line Dictionary of Computing (30 December 2018):

DDP

   Distributed Data Processing