| IFIS | Institute For Impure Science 
| Others |
| IFIS | Institute For Internet Security
| Others |
| IFIS | Integrated Facilities Information System
| Others |
| IFIS | Integrated Flight Information System
| Others |
| IFIS | Integrated Functional Imaging System
| Others |
| IFIS | Integriertes Fuhrangs und Information System (German counterpart to CVC2)
| Others |
| IFIS | International Food Information Service
| Others |
| IFIS | Intraoperative Floppy Iris Syndrome
| Others |
| IFIS | Iowa Flood Information System
| Others |
| IFIS | Islamic Finance Information Service
| Others |
| IFIS | The Institut De Formation Des Industries De Sant
| Others |