Culture

• Peter, Paul and Mary
  Peter, Paul and Mary
  Peter, Paul and Mary were an American folk-singing trio whose nearly 50-year career began with their rise to become a paradigm for 1960s folk music. The trio was composed of Peter Yarrow, Paul Stookey and Mary Travers...
  
  , a 1960s folk music trio
• Picture Postcard Monthly, a magazine for collectors of postcard
  Postcard
  A postcard or post card is a rectangular piece of thick paper or thin cardboard intended for writing and mailing without an envelope....
  
  s
• Please Please Me
  Please Please Me
  Please Please Me is the debut album by the English rock band The Beatles. Parlophone rush-released the album on 22 March 1963 in the United Kingdom to capitalise on the success of singles "Please Please Me" and "Love Me Do" .Of the album's fourteen songs, eight were written by Lennon–McCartney...
  
  , the first album by The Beatles

Health

• Permanent pacemaker or artificial pacemaker
• Persistent pupillary membrane
  Persistent pupillary membrane
  Persistent pupillary membrane is a condition of the eye involving remnants of a fetal membrane that persist as strands of tissue crossing the pupil. The pupillary membrane in mammals exists in the fetus as a source of blood supply for the lens. It normally atrophies from the time of birth to the...
  
  , a condition in the eye

Technology

• Parry People Movers
  Parry People Movers
  Parry People Movers Ltd. is a British company manufacturing lightweight trams and railcars that use flywheel energy storage to store energy for traction, allowing electric systems to operate without overhead wires or third rails, and railcars fuelled by small gas, diesel or hydrogen engines,...
  
  , a British company manufacturing lightweight railbuses
• Parts per million, a way of quantifying small concentrations, usually mass
• Peak programme meter
  Peak programme meter
  A peak programme meter is an instrument used in professional audio for indicating the level of an audio signal.There are many different kinds of PPM. They fall into broad categories:...
  
  , a type of audio level meter
• Perl package manager
  Perl package manager
  Perl Package Manager is a Perl utility intended to simplify the tasks of locating, installing, upgrading and removing software packages...
  
  , a packaging system for distributing precompiled modules for use with the Activestate binary distribution of the Perl programming language
• Permutation parity machine, a form of neural network used in neural cryptography
• Portable pixmap, a graphics file format. See Netpbm format
• Portable People Meter
  Portable People Meter
  The Portable People Meter is a system developed by Arbitron to measure how many people are listening to individual radio stations and television stations, including cable TV. The PPM is worn like a pager, and detects hidden audio tones within a station or network's audio stream, logging each...
  
  , created by Arbitron to measure radio broadcast audiences
• PPM Star Catalogue
  PPM Star Catalogue
  The PPM Star Catalogue is the successor of the SAO Catalogue. It contains precise positions and proper motions of 378,910 stars on the whole sky in the J2000/FK5 coordinate system....
  
   An astrometric catalogue of 378,910 stars
• Prediction by Partial Matching, an adaptive statistical data compression algorithm based on context modeling and prediction used in computer science
• Proton precession magnetometer, which measures the strength and/or direction of a magnetic field by measuring the resonance frequency of protons (hydrogen nuclei) in the magnetic field
• Pulse-position modulation
  Pulse-position modulation
  Pulse-position modulation is a form of signal modulation in which M message bits are encoded by transmitting a single pulse in one of 2^M possible time-shifts. This is repeated every T seconds, such that the transmitted bit rate is M/T bits per second...
  
  , a modulation scheme
• pixel per meter, analog of dots per inch
  Dots per inch
  Dots per inch is a measure of spatial printing or video dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch . The DPI value tends to correlate with image resolution, but is related only indirectly.- DPI measurement in monitor...
  
  

Other

• Pages per minute, a measurement of printing speed
• Partido Popular Monárquico (People's Monarchist Party), Portuguese political party
• Partially Permeable Membrane
• Persekutuan Pengakap Malaysia
  Persekutuan Pengakap Malaysia
  Persekutuan Pengakap Malaysia is an organisation for boys and girls between the ages of 10 and 17, based in Malaysia. Persekutuan Pengakap Malaysia is part of the global Scouting movement and national member of the World Organization of the Scout Movement...
  
  , the Scouts Association of Malaysia
• Planned Preventative Maintenance, a schedule/program for building maintenance
• Progressive Party of Maldives
  Progressive Party of Maldives
  The Progressive Party of Maldives, also known as the PPM, is a political party in the Maldives. The party was formed by Maumoon Abdul Gayyoom in 2011 after resigning from his first party, Dhivehi Rayyithunge Party , citing corruption of views after new leadership. The political party first emerged...
  
  , a political party in the Maldives
• Private Placement Memorandum, the initial offering document for a private placement, also known as prospectus
• Probabilistic Packet Marking, an IP Traceback method
• "Processor Power Management", an update of Advanced Configuration and Power Interface
  Advanced Configuration and Power Interface
  In computing, the Advanced Configuration and Power Interface specification provides an open standard for device configuration and power management by the operating system....
  
  
• Product Portfolio Management, an aspect of Product Management
  Product management
  Product management is an organizational lifecycle function within a company dealing with the planning, forecasting, or marketing of a product or products at all stages of the product lifecycle....
  
  
• Project Portfolio Management
  Project Portfolio Management
  Project portfolio management is a term used by project managers and project management organizations, , to describe methods for analyzing and collectively managing a group of current or proposed projects based on numerous key characteristics...
  
  , management of a set of programmes as a single portfolio