IED may refer to:
Devices
- Improvised explosive device, an explosive device often used in unconventional warfare
- Instantaneous electrical detonator, used to trigger an explosive device
- Intelligent electronic device, in the electric power industry
- Implantable electronic device, pacemaker
Dictionaries
- Indo-European Etymological Dictionary
- Indogermanisches etymologisches Wörterbuch (Indo-European Etymological Dictionary), by Julius Pokorny
- Interlingua–English Dictionary, the first major presentation of Interlingua to the public
Healthcare
- Inter-ictal epileptiform discharge, a characteristic of epileptic seizures
- Intermittent explosive disorder, a mental health disorder
- Intestinal epithelial dysplasia, another name for congenital tufting enteropathy
Organizations
- Information Engineering Directorate, Information Technology Directorate of the UK Department of Trade and Industry
- Institute for Educational Development, at Aga Khan University
- Institute of Economic Development
- Institution of Engineering Designers, in the UK
- Istituto Europeo di Design, European Institute of Design
- NASU Institute of Electrodynamics, a research institute in Kyiv
Other uses
- Industrial Emissions Directive, a European Union directive
- Infliction of Emotional Distress, a tort cause of action, falling under intentional torts