(redirected from Old Spanish Trail Association)
OSTAOptical Storage Technology Association
OSTAOsteoporosis Self-Assessment Tool for Asians
OSTAOffice of Space and Terrestrial Applications (US NASA; now OAST)
OSTAOld Spanish Trail Association
OSTAOpen Standard Telecom Architecture (hardware platform)
OSTAOccupational Skill Testing Authority (China)
OSTAOhio State Trappers Association (est. 1940)
OSTAOklahoma Science Teachers Association (Stillwater, OK)
OSTAOberlin Student Theater Association (Oberlin College; Ohio)
OSTAOregon Substitute Teachers Association