1. 
   RPN
   acronym: Division de la recherche en prevision numerique
   Found op http://cdiac.ornl.gov/pns/acronyms.html#R
   
   
2. 
   RPN
   Real Page Number + Reverse Polish Notation
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
3. 
   RPN
   RPN may be an acronym that refers to: RPN may also refer to: ...
   Found op http://en.wikipedia.org/wiki/RPN
   
   
4. 
   RPN
   postfix notation
   Found op http://foldoc.org/RPN
   
   
5. 
   rpn
   1) Division de la recherche en prevision numerique
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/rpn/1
   
   

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