Acronym
- CATT, Combined Arms Tactical Trainer
- CATT, Chinese Academy of Telecommunications Technology, developer of China's own 3G standard
- CATT, Computer-Aided Test Tool
- CATT, New York State Center for Advanced Technology in Telecommunications at Polytechnic Institute of New York University
- Centre d'Analyse Théorique et de Traitement, an economics research center based in the University of Pau, France
- CATT, Civil Aviation Transformation Team of the Directorate-General of Civil Aviation of the Republic of Indonesia.
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