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"
Science Percentage depth dose curve, the absorbed radiation dose in a medium, varying with depth. Pulsed discharge detector, a type of gas chromatography ion detector New Zealand Fungarium (PDD), a national collection of dried fungi and plant diseases
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
Others Punggol Digital District, a technologically advanced regional hub located in the Punggol new town, Singapore.