PDD often refers to Pervasive developmental disorder.

PDD may also refer to:

Medicine edit

Physics and chemistry edit

Computing and technology edit

Business and law edit

  • 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 edit

Arts edit