1. 
   OCN
   acronym: Oceania
   Found op http://cdiac.ornl.gov/pns/acronyms.html#O
   
   
2. 
   OCN
   Oncology Certified Nurse
   Found op http://www.encyclo.co.uk/local/20895
   
   
3. 
   OCN
   OCN is a three letter abbreviation that stands for: OCN may also refer to: ...
   Found op http://en.wikipedia.org/wiki/OCN
   
   
4. 
   OCN
   Operating Company Number - the OCN is a numeric field identifying the Local Service Provider (LSP) that has been assigned the NXX.
   Found op http://www.puc.state.pa.us/telecom/areacode/area_code_dictionary.xhtml
   
   
5. 
   ocn
   1) Oceania
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/ocn/1
   
   

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