| Acronym | Definition |
|---|
| IEM | Institution of Engineers, Malaysia |
| IEM | In Ear Monitor |
| IEM | Inborn Errors of Metabolism (molecular biology) |
| IEM | Industrial Engineering and Management (course/program) |
| IEM | Intelligent Energy Management |
| IEM | Innovative Emergency Management, Inc. |
| IEM | Information Engineering Methodology |
| IEM | Integrated Environmental Management, Inc. |
| IEM | Integral Equation Method |
| IEM | Internal Electricity Market |
| IEM | Institute of Engineering Mechanics (China) |
| IEM | Integrated Electronics Module |
| IEM | Industrial Entrepreneur Memoranda (India) |
| IEM | Interpretative / Explanatory Material (Joint Aviation Requirements) |
| IEM | Institute of Environmental Medicine (Sweden) |
| IEM | Institute of Engineering and Management |
| IEM | Interim Examination and Maintenance |
| IEM | Inactive Equipment Maintenance |
| IEM | Independent Electron Model |
| IEM | Industrial Electric Manufacturing (Fremont, CA) |
| IEM | Istanbul Emniyet Mudurlugu (Istanbul Security Administration) |
| IEM | Institute of Epidemiology and Microbiology |
| IEM | Integrated ESM Mast |
| IEM | Infinite Energy Magazine |
| IEM | Immune Electron Microscope |
| IEM | Industrial End-user Market |
| IEM | Integrated Elevation Model |
| IEM | Integrated Equipment Manager (Boeing Aerospace) |
| IEM | Initial Estimate of Manpower |
| IEM | Instructor Evaluation Matrix |
| IEM | Installation Equipment Manager/Management |
| IEM | Invalid End of Message |
| IEM | International European Movement |