1. 
   OCG
   Office of Government Commerce
   Found op http://www.abhi.org.uk/glossary/default.xhtml
   
   
2. 
   OCG
   OCG: Oral cholecystogram.
   Found op http://www.medterms.com/script/main/art.html?articlekey=24959
   
   
3. 
   OCG
   Operational Command Group
   Found op http://www.met.police.uk/foi/glossary.htm
   
   
4. 
   ocg
   1) Office of government commerce
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/ocg/1
   
   

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