1. 
   UAN
   United American Nurses
   Found op http://www.encyclo.co.uk/local/20895
   
   
2. 
   UAN
   User Action Notation. A notation from VPI for representation of activity in a graphical user interface. [H. Hartson et al, ACM Trans on Info Sys, July 1990]. (1994-10-31)
   Found op http://foldoc.org/UAN
   
   
3. 
   UAN
   UAN is a solution of urea and ammonium nitrate in water used as a fertilizer. The combination of urea and ammonium nitrate has an extremely low critical relative humidity (18% at 30°C) and can therefore only be used in liquid fertilizers. The most commonly used grade of these fertilizer solutions ...
   Found op http://en.wikipedia.org/wiki/UAN
   
   

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