| Acronym | Definition |
|---|
| FISS | Fiscal Intermediary Standard System (Medicare) |
| FISS | Formación, Información y Servicios Sociales (Spanish: Training, Information and Social Services) |
| FISS | Full in Service Support (various companies) |
| FISS | Foreign Intelligence and Security Services (US Defense Intelligence Agency) |
| FISS | Family and Individual Support Services (disability help) |
| FISS | Federazione Italiana Sport Silenziosi (Italian: Italian Sport Federation for the Deaf) |
| FISS | Fish Information Stream Summary |
| FISS | Flight, Invulnerability, Speed, Strength (comic book slang) |
| FISS | Facility Inspection Support System (FDA computer program used by inspectors in the USA to report findings.) |