ASTRA (reactor) (Adaptierter Schwimmbecken-Typ-Reaktor Austria), a type of nuclear reactor
ASTRA, Alliance for Science & Technology Research in America, an American Industry and Professional Advocacy Group [www.aboutastra.org] and [www.usinnovation.org]
ASTRA, (Access to Systems, Tools, Resources and Applications) is an authorization system that stores information about who can use a wide variety of administrative applications and tools across the UW campus. [www.washington.edu/computing/astra/]