| Acronym | Definition |
|---|
| COSA➣Committee on Substance Abuse (various organizations) |
| COSA➣City of San Antonio (Texas) |
| COSA➣Court of Special Appeals (Maryland) |
| COSA➣City of Saint Augustine (Florida) |
| COSA➣Council of State Archivists |
| COSA➣Circles of Support and Accountability |
| COSA➣Collegiate Society of Advertising (Ateneo de Manila University; Philippines) |
| COSA➣Codependents of Sex Addicts |
| COSA➣Committee on Sustainability Assessment (international consortium) |
| COSA➣Certificates of On-Site Systems Approval (confirmation of septic system inspection) |
| COSA➣Cost-of-Service Analysis |
| COSA➣Co-Sex Addicts Anonymous (Minneapolis, MN) |
| COSA➣City of Santa Ana (California) |
| COSA➣Carbon Monoxide Safety Association (Eastlake, CO) |
| COSA➣Coordinator of Student Activities |
| COSA➣Casualties of Sexual Allegations |
| COSA➣Company of Science & Art |
| COSA➣Clustering Objects on Subsets of Attributes |
| COSA➣Children of Substance Abuse |
| COSA➣Communications Open System Architecture |
| COSA➣Central Ontario Soaring Association |
| COSA➣Combat Operational Support Aircraft |
| COSA➣Corps Service Area |
| COSA➣Coptic Orphans Support Association (Falls Church, VA) |
| COSA➣Computational Social Aggregation |