PPM may refer to: Business in general Planned preventive maintenance Project portfolio management Public performance measure, UK measure of rail punctuality Procurement Performance Management Organizations Mauritanian People's Party Parry People Movers, UK flywheel vehicle manufacturer Pashtun Tahafuz Movement (PTM), also known as the Pashtun Protection Movement (PPM), a human rights movement in Pakistan for the Pashtun people Partido Popular Monárquico (People's Monarchist Party), Portugal Persekutuan Pengakap Malaysia, the Scouts Association of Malaysia People's Progressive Movement (Cayman Islands) Progressive Party of Maldives Science and technology Computing Pages per minute, a measurement of printing speed Perl package manager, for software packages Planted partition model, a special case of Stochastic block model Portable pixmap format, a Netpbm format Prediction by partial matching, a data compression technique Medicine Permanent pacemaker Persistent pupillary membrane, an eye condition Physician practice management Online advertising PPM (Pay per 1000 impressions) Other uses in science and technology Parts per million, ppm Carbon dioxide in Earth's atmosphere, ppm Peak programme meter, measuring audio level PPM Star Catalogue of 378,910 stars Proton precession magnetometer, measures small magnetic field variations Pulse-position modulation of a signal. Other uses Pepsi Venezuela Music Awards (Premios Pepsi Music Venezuela) Portable People Meter, to measure radio and TV broadcast audiences Private Placement Memorandum, offering document for private placements Peter, Paul and Mary, American folk group See also Temperature coefficient, in parts per million per Kelvin (ppm/K) or per degree Celsius (ppm/C)