What does AZA stand for?

What does AZA mean?

AZA	Alza Corporation Business » NYSE Symbols
AZA	American Zoological Association Business » Professional Organizations
AZA	Analiza Zanieczyszczenia Atmosfery Academic & Science » Astronomy
AZA	Association of Zoos and Aquariums Business » Professional Organizations
AZA	Association of Zoos and Aquariums Community » Educational
AZA	Association of Zoos and Aquariums Community » Non-Profit Organizations

aza(Noun): Used attributively for a nitrogen atom substituted for a carbon atom within a ring