PTP may refer to: Science and technology partial thumb print,an Impression left by friction ridges of a human thumb Peak-to-peak, an amplitude of a signal Permeability transition pore, a mitochondrial channel protein complex Post-tetanic potentiation, a short-lived form of synaptic plasticity Post-transfusion purpura, a type of adverse reaction to a blood transfusion Protein tyrosine phosphatase, a group of enzymes Computing PET Transfer Protocol, a file transfer protocol developed for Commodore-based bulletin boards Picture Transfer Protocol, a protocol for digital cameras Precision Time Protocol, a time synchronization protocol Music PTP (artist collective), an American experimental music collective and record label PTP (band) (Programming the Psychodrill), an American industrial music group, side project of Ministry Pay Money to My Pain, a Japanese rock band Phonation threshold pressure, the amount of air pressure required to initiate vibration of the vocal cords Organisations Pheu Thai Party, a political party in Thailand Portuguese Labour Party, a left-of-centre political party in Portugal Togolese Party of Progress, a defunct political party in Togoland Places Pointe-à-Pitre International Airport (IATA code), Guadeloupe Port of Tanjung Pelepas, in Johor, Malaysia Other uses Practitioner Training Programme, of the UK Modernising Scientific Careers initiative Professional transportation planner, an American personal certification program Publicly traded partnership, a limited partnership whose interests are regularly traded on an established securities market. See also Peer-to-peer (P2P) Point-to-point (disambiguation) P2P (disambiguation)