ORTA


AcronymDefinition
ORTAOak Ridges Trail Association (Canada)
ORTAOhio Retired Teachers Association (Columbus, OH)
ORTAOlympic Roads and Transport Authority (Australia)
ORTAOffice of Research and Technology Application
ORTAOhio Rehabilitation Technology Association
ORTAOhio Rail Tourism Association (est. 1999)