| IFR | I Follow Roads 
| Others |
| IFR | I Freaking Rule
| Others |
| IFR | Ideal Final Result
| Others |
| IFR | Ignacio Fernandez Racing
| Others |
| IFR | In Flight Refueling
| Others |
| IFR | in-Band Frame Rendering
| Others |
| IFR | In-Flight Refuelling
| Others |
| IFR | Income Fund Reimbursable
| Others |
| IFR | Increasing Failure Rate
| Others |
| IFR | Individual Funding Request
| Others |
| IFR | Industrial Frame Router
| Others |
| IFR | Inertial Frame of Reference
| Others |
| IFR | Infection Fatality Rate
| Others |
| IFR | Inflight Refueling
| Others |
| IFR | Inherent Flame Retardant
| Others |
| IFR | Inherently Flame Resistant
| Others |
| IFR | Inherently Flame Retardent
| Others |
| IFR | Inspiratory Flow Rate
| Others |
| IFR | Institute for Field Research
| Others |
| IFR | Institute for Fisheries Resources
| Others |
| IFR | Institute of Food Research
| Others |
| IFR | Instituto Familiar de la Raza
| Others |
| IFR | Instructional Flight Regulations
| Others |
| IFR | Instrument Flight Rule
| Others |
| IFR | Instrument Flight Rules
| Others |
| IFR | Integral Fast Reactor
| Others |
| IFR | Integrated Fabric Resource
| Others |
| IFR | Interactive Fax Response
| Others |
| IFR | Interim Final Rule
| Others |
| IFR | Interior Furniture Resources
| Others |
| IFR | Interleaved Frame Recording
| Others |
| IFR | Internal Floating Roof
| Others |
| IFR | International Federation of Robotics
| Others |
| IFR | International Finals Rodeo
| Others |
| IFR | International Financing Review
| Others |
| IFR | Interrupt Flag Register
| Others |
| IFR | Investment Fluctuation Reserve
| Others |
| IFR | Iris Frame Relay
| Others |
| IFR | Isochronous Frame Reference
| Others |
| IFR | isoflavone reductase
| Others |
| IFR | Issued For Review
| Others |