QCA may refer to:
- Qualifications and Curriculum Authority, formerly an executive non-departmental public body (NDPB) of the Department for Education in the United Kingdom
- Qualitative comparative analysis, a technique for solving the problems that are caused by making causal inferences on the basis of only a small number of cases
- Quantitative Coronary Angiography, a technique for measuring vessel diameters during angiography procedures.
- Quantum cellular automata, any one of several models of quantum computation
- Queensland College of Art, a specialist arts and design college located in South Bank, Brisbane, and Southport, Gold Coast Australia
- Queensland Cricket Association
- Quezon City Academy, a Secondary school in Quezon City, Philippines
- Quoted Companies Alliance, a not-for profit organisation representing small businesses
- Quad Cities Area, is a geographic region of the Mid-Mississippi Valley of the United States that includes several communities in the states of Iowa and Illinois.
and also :
- Mecca, Saudi Arabia's airport IATA code
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