1. 
   SIU
   System Interface Unit
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   SIU
   Societá Italiana di Urologia
   Found op http://www.encyclo.co.uk/local/20895
   
   
3. 
   SIU
   Seafarers International Union.
   Found op http://www.insurexchange.com/glossary/maritime.htm
   
   
4. 
   SIU
   Service Intelligence Unit
   Found op http://www.met.police.uk/foi/glossary.htm
   
   
5. 
   siu
   1) System interface unit
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/siu/1
   
   

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