1. 
   UB
   (Aviation abbreviations:) utility bus
   Found op http://www.aviationonline.co.uk/glossary/uz.htm
   
   
2. 
   Ub
   [river] The Ub (Serbian Cyrillic: Уб) is a river in western Serbia, a 57 km-long right and longest tributary to Tamnava river. The Ub originates from the Vlašić mountain in Podgorina region of west Serbia, near the village of Kasapo. From its source to the mouth, the river flows to the e...
   Found op http://en.wikipedia.org/wiki/Ub_(river)
   
   

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