IED is a three-letter abbreviation which may refer to:
* Improvised explosive device, an explosive device often used in unconventional warfare
* Istituto Europeo di Design, The European Institute of Design
* Indo-European Etymological Dictionary, by Julius Pokorny
* Instantaneous electrical detonator
* Interlingua-English Dictionary, the first major presentation of Interlingua to the public
* Intermittent explosive disorder, a disorder of the brain.
* International Endowment for Democracy, a U.S. non-profit organization.
* Intelligent electronic device
* Intelligent edge device, an interface device supporting complex protocols and packet encapsulations to manage diverse network topologies and deliver new services
* Immigration Employment Document, in the context of UK Immigration Documentation.
* Institute for Educational Development, at the Aga Khan University
* Individual educational development, one name for a Special education class
but LMFAO @ did you eat the drumstick