| Abbreviation | Definition |
|---|---|
| IRREF | Industry Recruitment Retention and Expansion Fund |
| IRREF | Industry Recruitment Retention Expansion Fund |
| IRRF | Iraq Relief and Reconstruction Fund |
| ISCF | Industrial Strategy Challenge Fund |
| ISDF | Informal Settlements Development Fund |
| ISDF | International Students Disability Fund |
| ISF | Internal Security Fund |
| ISF | International Service Fund |
| ISFB | Internal Security Fund Borders |
| ISFD | Islamic Solidarity Fund for Development |
| ISSF | Institutional Strategic Support Fund |
| ITAF | Industrial Technical Assistance Fund |
| ITEF | Iraq Train and Equip Fund |
| ITEF | Iraq Train Equip Fund |
| ITF | Index Traded Fund |
| ITF | Industrial Trainging Fund |
| ITF | Infrastructure Trust Fund |
| ITF | Innovation and Technology Fund |
| ITF | International Trans Fund |
| IVF | International Visegrad Fund |