DPD

• Dead Peer Detection, an IPSec VPN feature
• Delegated Path Discovery, a public-key query method
• Densely packed decimal, a system of binary encoding for decimal digits

• Dew point depression
• Diffusion pressure deficit
• Digital pre-distortion, a subset of multidimensional digital pre-distortion that deals with linearization of non-orthogonal, non-linear systems.
• Digital product definition, a near-synonym of model-based definition
• Dissipative particle dynamics, a mesoscopic particle-based materials simulation technique
• Diver propulsion device, an underwater vehicle

• EU Dangerous Preparations Directive
• EU Data Protection Directive
• Development Plan Document, in town and country planning in England and Wales
• Digital Phonorecord Delivery, a U.S. Copyright Office process for sound recording registration
• Denver Police Department, Colorado
• Detroit Police Department, Michigan
• Dallas Police Department, Texas

• Dependent personality disorder, over-dependence on others
• Depersonalization-derealization disorder, feeling detached from one's self
• Depressive personality disorder, disorder with depressive features

• Dihydropyrimidine dehydrogenase, an enzyme
• N,N-diethyl-p-phenylenediamine, a phenylenediamine often used to determine chlorine in water

• Democratic Party of Germany ({{langx|de|Demokratische Partei Deutschlands|link=no}}), liberal party in Germany
• Regional Representative Council ({{langx|id|Dewan Perwakilan Daerah|link=no}}), a chamber of the Indonesian parliament

• DPD, a subsidiary of international parcel-delivery business Geopost
• {{lang|es|Diccionario panhispánico de dudas}} (Pan-Hispanic Dictionary of Doubts), Spanish lexicon
• Distributed participatory design
• Dorking Deepdene railway station, England (GBR code: DPD)

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