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

PRA
       Purported Responsible Address [algorithm] (MS, SPAM)


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

PRA

   PRAgmatics.

   The language used by COPS for specification of code
   generators.

   ["Metalanguages of the Compiler Production System COPS", J.
   Borowiec, in GI Fachgesprach "Compiler-Compiler", ed
   W. Henhapl, Tech Hochs Darmstadt 1978, pp. 122-159].

   (1994-11-18)