PSA
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PSA is an acronym which stands for:
- 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 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
- Professional Squash Association, the operator of the Men's Professional Game of Squash
- Paralysis Society of America, a group who's activity is based on The Paralyzed Veterans Of America except supporting civilians
- 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