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
Other uses Administrative and Diplomatic Officer, a specific group of civil servants who play a crucial role in the Malaysian public service Participatory technology development, in international agriculture programs or the Dominican Workers' Party Potsdam Municipal Airport, New York, US (FAA LID:PTD) Post travel depression, a mood disorder Prevention through design, in occupational health and safety