PSA

PSA is a TLA which stands for:

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• Public service announcement
• Prostate-specific antigen, a substance that can be detected in the blood of men and which helps to determine if there may be a prostate cancer
• Pacific Southwest Airlines, a former U.S. airline that used to fly passenger services inside California and to other nearby Western areas during the 1970s and early 1980s; it's trademark was a smile drawn under their planes' cockpits
• PSA Airlines a subsidary of US Airways Group
• PSA Peugeot Citroën Group (from 'Peugeot Société Anonyme'), a French company which builds the Peugeot and Citroën cars
• PSA International, a port operator based in Singapore; it is also an abbreviation for the now defunct Port of Singapore Authority
• Premier Soccer Alliance, the original name of the World Indoor Soccer League
• Product and Service Agreement
• Professional Squash Association, the operator of the Men's Professional Game of Squash
• Paralysis Society of America, a group whose activity is based on The Paralyzed Veterans Of America except supporting civilians
• Philosophy of Science Association
• Pharmaceutical Society of Australia
• Public Service Association, a large union for workers in the public sector of New Zealand
• Production Services Association, a union in the United Kingdom
• Public Securities Association
• Pressure-sensitive adhesive
• Pacific Sociological Association
• Probabalistic Safety Assessment