OCA

OCA or Oca may refer to:

Business and politics

• Odisha Cricket Association, state cricket body of BCCI
• Open Content Alliance, consortium of organizations contributing to a publicly accessible archive of digitized texts
• Optimum currency area, geographical region which efficiently shares a single currency
• Oregon Citizens Alliance, conservative Christian political activist organization
• Organic Consumers Association, consumer protection and organic agriculture advocacy group
• Organization of Chinese Americans, national Asian Pacific American social and civic organization
• Oxford Conservative Association, student political organisation at the University of Oxford

Government

• Court of Appeal for Ontario, frequently referred to as the Ontario Court of Appeal or OCA
• Office of Consumer Affairs (Canada), government agency of Industry Canada
• Olympic Council of Asia, governing body of sports in Asia
• Organised and Financial Crime Agency of New Zealand, formerly known as the Organised Crime Agency
• Organized Crime Agency of British Columbia (1999-2004), predecessor of the Combined Forces Special Enforcement Unit
• Outback Communities Authority, an authority providing municipal services to communities in Outback South Australia

Religion

• Orthodox Church in America
• Oxford Capacity Analysis, also known as the American Personality Analysis, a personality test used in Scientology
• Oca (bishopric), a now titular Catholic see in Asia Minor

Technology

• Crash reporter, also known as Online Crash Analysis
• Odoo Community Association, an organization supporting the Odoo (formerly OpenERP) community
• Open Control Architecture, network control protocol for audio and video devices (AES70)
• Oracle Certified Associate (OCA), a level of the Oracle Certification Program

Medicine

• OCA1 gene associated with albinism
• Oculocutaneous Albinism

Other uses

• Oxalis tuberosa, a starchy, edible tuber, grown in South America
• Côte d'Azur Observatory, French name: Observatoire de la Côte d'Azur
• Oakland Charter Academy, a member school of Amethod Public Schools
• Oca (river), a tributary of the Ebro, Spain, having its source in the comarca of Montes de Oca
• Oca (structure), a kind of Brazilian indigenous dwelling
• Offensive counter air, military term
• Old Croton Aqueduct, especially when referring to the hiking trail
• Open College of the Arts
• Open coloring axiom in mathematics
• Operation Crossroads Africa, a volunteer organization
• Orange County Airport - several airports in the United States
• Oregon Coast Aquarium
• Iruña de Oca