QCA may refer to:

• Qualifications and Curriculum Authority, an Executive Non-Departmental Public Body of the Department for Children, Schools and Families 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
• 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

and also :

• Mecca, Saudi Arabia's airport IATA code

it:QCA

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