| I&PR | Information & Public Relations  
| Agency, Communication |
| IPR | Chrysler Imperial
| Others |
| IPR | Immediate Phase Reaction
| Others |
| IPR | In Process Review
| Others |
| IPR | In-Process Review
| Others |
| IPR | In-Progress Review
| Others |
| IPR | Inches Per Raster
| Others |
| IPR | Inches Per Revolution
| Others |
| IPR | Incident Performance Report
| Others |
| IPR | Independent Police Review
| Others |
| IPR | Independent Professional Review
| Others |
| IPR | Indian Press Registration
| Others |
| IPR | Indiana Public Radio
| Others |
| IPR | Indicated Point Rendering
| Others |
| IPR | Indie Press Revolution
| Others |
| IPR | Indirect Potable Reuse
| Others |
| IPR | Individual Participant Request
| Others |
| IPR | Individual Performance Review
| Others |
| IPR | Indoor Plumbing Rehabilitation
| Others |
| IPR | Industrial Property Rights
| Others |
| IPR | Infinite Power Reality
| Others |
| IPR | Ingenuity Precision Results
| Others |
| IPR | Injection Pressure Regulator
| Others |
| IPR | Injector Pressure Regulator
| Others |
| IPR | Inland Pipe Rehabilitation
| Others |
| IPR | Inprocess Inprogress Review
| Others |
| IPR | Insane Performance Rendering
| Others |
| IPR | Installshield Project
| Others |
| IPR | Institute for Policy Research
| Others |
| IPR | Institute for Population Research
| Others |
| IPR | Institute for Public Relations
| Others |
| IPR | Institute of Production Recording
| Others |
| IPR | Integrated Photonics Research
| Others |
| IPR | Integrated Program Review
| Others |
| IPR | Integrity Performance And Reliability
| Others |
| IPR | Intellectual and Property Rights
| Others |
| IPR | Intellectual Piracy Rights
| Others |
| IPR | Intellectual Property Resources
| Others |
| IPR | Intellectual Property Right
| Others |
| IPR | Intellectual Property Rights
| Others |
| IPR | Intelligence Production Requirement
| Others |
| IPR | Intelligent Parking Reservation
| Others |
| IPR | Inter Partes Review
| Others |
| IPR | Inter Proximal Reduction
| Others |
| IPR | Interactive Photo Realistic
| Others |
| IPR | Interactive Photorealistic Rendering
| Others |
| IPR | Interdisciplinary Practice and Reflection
| Others |
| IPR | Interim Problem Report
| Others |
| IPR | Interlochen Public Radio
| Others |
| IPR | Internal Program Representation
| Others |
| IPR | Internal Purchase Requisition
| Others |
| IPR | International Planning and Research
| Others |
| IPR | International Product Registration
| Others |
| IPR | Internet Policy Review
| Others |
| IPR | Internet Purchasing Roundtable
| Others |
| IPR | Intrathoracic pressure regulation
| Others |
| IPR | Invalid Program Reference
| Others |
| IPR | Investment Property Research
| Others |
| IPR | Inward Processing Relief
| Others |
| IPR | Inzhenerny Podvodny Razvedchik
| Others |
| IPR | Iowa Percentile Rank
| Others |
| IPR | Iowa Public Radio
| Others |
| IPR | Irrational Public Radio
| Others |
| IPR | Isolated Pentagon Rule
| Others |
| IPR | isoproterenol
| Others |