Look up PDD in Wiktionary, the free dictionary.

PDD often refers to Pervasive developmental disorder.

PDD may also refer to:

Medicine

• Parkinson's disease dementia
• Penile dysmorphic disorder
• Persistent depressive disorder, also known as dysthymia
• Persons with developmental disabilities
• Prescribed daily dose
• Progressive diaphyseal dysplasia, also known as Camurati–Engelmann disease
• Proventricular dilatation disease, also known as "macaw wasting disease"

Physics and chemistry

• Percentage depth dose curve, the absorbed radiation dose in a medium, varying with depth.
• Pulsed discharge detector, a type of gas chromatography ion detector

Computing and technology

• Physical device driver
• An alternative file extension for Portable Document Format files that are preferentially opened by Adobe Photoshop
• Process Driven Development, software development methodology
• Professional Disc for DATA or ProDATA, an optical disc format produced by Sony

Business and law

• Pinduoduo, NASDAQ ticker PDD
• Project Design Document, a precise project description which serves as the basis for the Clean Development Mechanism (CDM) (project evaluation)
• Public Domain Day, an observance of when copyrights expire and works enter into the public domain

Politics

• Partnership for Democracy and Development in Central America
• Party for Democratic Action (Partija za demokratsko delovanje), a political party in Serbia
• Presidential Decision Directive, a kind of national security directive from the Bill Clinton presidency

Arts

• P. Diddy, rapper and entrepreneur
• Pas de deux, a type of ballet dance
• Pinky Dinky Doo, children's television series
• Please Don't Destroy, comedy group from New York City