Department of Energy Department of Education Date of Entry Depends On Experience Department of Ecology Design of Experiment diffractive optical element Distributed Objects Everywhere Department of Environment Department of the Environment design of experiments Designated Operational Entity Direct Order Entry Distributed Objects Environment Duke Of Edinburgh dyspnea on exertion date of enlistment Date of Entitlement date of examination Declaration of excess Demonstration of Equivalence Department of Electronics Department of Emergency Department of Energy's Department of Optical Engineering Designated Operating Entities Diagram Of Effects Director Operations and Engineering Discover Ocean Engineering Distributed Object Environment