| Acronym | Definition |
|---|
| IFS | Institute for Fiscal Studies |
| IFS | International Food Standard |
| IFS | Integrated File System |
| IFS | Industrial and Financial Systems |
| IFS | International Financial Statistics (International Monetary Fund) |
| IFS | International Foundation for Science |
| IFS | Internet File System (Oracle) |
| IFS | Installable File System |
| IFS | Internal Field Separator |
| IFS | Iterated Function System |
| IFS | IOS File System (Cisco Systems Inc.) |
| IFS | Institut für Schulentwicklungsforschung (University Dortmund, Germany) |
| IFS | Independent Front Suspension |
| IFS | I Feel Stupid |
| IFS | Indian Forest Service |
| IFS | Indian Foreign Service |
| IFS | Input Field Separator |
| IFS | International Federation of Settlements and Neighbourhood Centres |
| IFS | I Feel Sick |
| IFS | Integrated Financial System |
| IFS | Interframe Spacing (data link layer) |
| IFS | International Freephone Service |
| IFS | Integrated Forecasting System |
| IFS | Integrated Facilities System |
| IFS | Infiniti Financial Services |
| IFS | In-Flight Safety |
| IFS | Inshore Fire Support |
| IFS | International Federation of Surveyors |
| IFS | Inland Fuel Surcharge (shipping) |
| IFS | Intelligent Fax System |
| IFS | Ionospheric Forward Scatter (ITS) |
| IFS | Indian Foreign Services |
| IFS | Institut für Schulungsmaßnahmen (Dortmund, Germany) |
| IFS | Islamic Foundation School (Villa Park, Illinois) |
| IFS | Interferential Stimulation |
| IFS | Integrated Flight Simulation |
| IFS | Intelligence Fusion Systems |
| IFS | International Flagship Service |
| IFS | International Fauna Society |
| IFS | Integrated Financial Management Systems |
| IFS | Interactive Forest Simulator |
| IFS | Interpretive Frame System (AT&T) |
| IFS | Information and Federation Strategy (US DoD) |
| IFS | Image File Server |
| IFS | Iranian Foundrymen's Society |
| IFS | Intel Financial Services |
| IFS | Insurance Fraud Section |
| IFS | Integrated Fluid Servicer |
| IFS | Immediate Foreclosure Solutions (Rialto, CA) |
| IFS | Interstate Freight Systems (Ontario, Canada) |
| IFS | Integrated Foundation Structure |
| IFS | Installation Facility System |
| IFS | Integrated Flow Solutions, Inc. |