IEM can refer to:

• Integrated Enterprise Modeling
• In ear monitors
• the Iowa Electronic Markets
• Incredible Expanding Mindfuck (Music)
• Information Engineering Methodology
• Institute of Electronic Music and Acoustics (Institut für Elektronische Musik und Akustik)
• Institute of Engineering and Management
• Inborn error of metabolism
• Innovative Emergency Management
• Institute for Experimental Mathematics
• Integrated Environmental Management

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