| Acronym | Definition |
|---|
| AFSI | AmTrust Financial Services, Inc (New York, NY casualty insurer) |
| AFSI | Americans for a Safe Israel |
| AFSI | Amphenol Fiber Systems International |
| AFSI | Asthma-Friendly Schools Initiative |
| AFSI | All Faiths Seminary International (New York) |
| AFSI | American Food Safety Institute |
| AFSI | American Feng Shui Institute |
| AFSI | Africa Food Security Initiative |
| AFSI | Australian Foundation for Studies in Italy |
| AFSI | Advanced Filtration Systems Inc |
| AFSI | Associate, Financial Services Institute |
| AFSI | Age at First Sexual Intercourse |
| AFSI | Aviation Fire & Security International |
| AFSI | Abstract Font Service Interface |
| AFSI | Audible Field Strength Indicator |
| AFSI | Alternate Food Stamp Issuance |
| AFSI | Automated Food System Inc |
| AFSI | Analog Fixed Station Interface |
| AFSI | Absolute Financial Services, Inc (Odessa, FL) |