| Acronym | Definition |
|---|
| RIF | Reading Is Fundamental |
| RIF | Reduction In Force |
| RIF | Rifampin (antituberculosis drug) |
| RIF | Royal Irish Fusiliers |
| RIF | Repeated Implantation Failure |
| RIF | Routing Information Field |
| RIF | Rapid Innovation Fund (US DoD) |
| RIF | Rate Increase Factor |
| RIF | Routing Information Filter |
| RIF | Report Interchange Format |
| RIF | Rhode Island Foundation (est. 1916) |
| RIF | Rule Interchange Format |
| RIF | Random Interesting Facts |
| RIF | Reading Is Fun |
| RIF | Retirement Income Fund (Canadian retirement plan) |
| RIF | Registre International Français (French: French International Register) |
| RIF | Right Iliac Fossa |
| RIF | Resistance Is Futile (Star Trek) |
| RIF | Reduced Injury Factor |
| RIF | Realistic Imitation Firearm |
| RIF | Réseaux en Ile-de-France (French regional music broadcasters' association) |
| RIF | Regional Innovation Fund (UK) |
| RIF | Rassemblement pour l'Indépendance de la France (French: Rally for the Independence of France) |
| RIF | Renju International Federation |
| RIF | Registro de Identificación Fiscal (Venezuelan IRS) |
| RIF | Rencontres de l'Ichtyologie en France (French: Meetings of Ichthyology in France) |
| RIF | Relative Importance Factor (classification feature selection) |
| RIF | Radar Interface |
| RIF | Room Inventory Form |
| RIF | Rabid Inuyasha Fan (Adult Swim message boards) |
| RIF | Ruhe in Frieden (German: rest in peace) |
| RIF | Read and Initial File (aviation) |
| RIF | Research Institute of Fruits (Indonesia) |
| RIF | Recoverable Irradiated Fuel (spent fuel) |
| RIF | Rain-Induced Fade |
| RIF | Resource Interchange Format |
| RIF | Refit Industrial Facility |
| RIF | Rate Input Form |
| RIF | Radiation-Induced Fault |
| RIF | Radgivende Ingeniorers Forening (Norwegian: Consulting Engineers Association) |