| Acronym | Definition |
|---|
| FOSA➣Friends of South Asia |
| FOSA➣Farook College Old Students Association (India) |
| FOSA➣Forestal Oriental SA (Uruguay) |
| FOSA➣Friends of St. Andrews (UK) |
| FOSA➣Friends of the School Association (UK) |
| FOSA➣Forskrift Om Forsvars- og Sikkerhetsanskaffelser (Norwegian: Regulations about Defence and Security Procurement) |
| FOSA➣Formula One Supporters Association (UK) |
| FOSA➣Facts, Objectives, Solutions, Actions (business philosophy) |
| FOSA➣Federation Of Spine Associations |
| FOSA➣Front Office Service Activities |
| FOSA➣Flight Operations Support Annex |
| FOSA➣Federal Operational Staging Area |
| FOSA➣Field Office System Administrator (Capstone Corporation) |
| FOSA➣Five O'clock Shadow Apparel (New York, NY) |
| FOSA➣Friends of the Office of State Archaeology, Inc (Connecticut) |