PTD

PTD may refer to: ==Law== Permanent total disability, in insurance law Pre-trial diversion, in criminal justice Protected trust deed, in Scottish bankruptcy law

==Science, technology and mathematics== Pathfinder Technology Demonstrator, ongoing NASA missions to test miniaturized satellites Peak–trough difference, of an oscillating curve Poloidal–toroidal decomposition, in vector calculus Pre-term delivery, a human birth under 37 weeks gestation PTD-DBM, a synthetic peptide to reverse hair loss Pre-Thread Data file, in Microsoft's .NET Framework