PM

PM or pm (also written P.M. or p.m.) is an abbreviation for Latin post meridiem, meaning "after noon" in the 12-hour clock.

PM or Pm may also refer to:

Sciences

• Particulate matter, particulates—fine dust and soot—suspended in the air
  • PM10, particulates, smaller than 10 μm, that can cause health problems
• PM3 (chemistry), or Parameterized Model number 3, a modelling method in computational chemistry
• Permanent magnet, an object which stays magnetised without external effort
• Perpetual motion, refers to movement that goes on forever
• Petameter, a length unit (10¹⁵ m) (Pm)
• Phase modulation, in electrical engineering
• PM tube, photomultiplier tube
• Picometre, a length unit (10⁻¹² m) (pm)
• Picomolar (pM), a concentration of molecules of a chemical substance that is in scale of magnitude less than "nanomolar" & more than "femtomolar". First character lowercase (i.e. pM)
• Plasma membrane, is a selectively permeable lipid bilayer found in all cells
• Powdery mildew, a fungal disease that affects a wide range of plants
• Powder metallurgy, a method of fabricating metals
• Premolar tooth, dental nomenclature
• Promethium, chemical element number 61 (Pm)
• Polymyositis, disease
• Post mortem, a medical examination carried out after death
• Principia Mathematica, a three-volume work on the foundations of mathematics
• Polarization-maintaining optical fiber
• Participatory medicine, a new model of medicine

People

• Prime minister, the most senior minister of a cabinet
• Pontifex Maximus, the high priest of the Ancient Roman College of Pontiffs
• Postmaster, the head of an individual post office
• P.M. (author), an anonymous Swiss author
• Photographers' Mate, a US Navy enlisted rating, merged into the Mass Communication Specialist (MC) rating in 2006
• Pat Maloney Sr. (1924–2005, also known as PM), American trial lawyer
• Project Manager, is a professional in the field of project management

Computing and Internet

• Pac-Man, character, video game, and TV series
• Paper Mario, a series of role-playing video games
• Particle Mesh, an algorithm for calculating the potential of a system (used in computational physics)
• Perl module, a discrete component of software for the Perl programming language (file extension .pm)
• Perl mongers, groups of local Perl enthusiasts
• Personal message or private message, a closed conversation between 2 or more people within community and social media sites
• Pocket Monsters (Pokémon), Japanese video game and animation franchise
• Power management, ability of some devices to reduce energy consumption
• Project M, a 2011 modification for the 2008 Wii video game, Super Smash Bros. Brawl
• Saint Pierre and Miquelon: ISO 3166-1 alpha-2 country code
  • .pm, the country code top level domain (ccTLD) for Saint Pierre and Miquelon

Business

• P.M. Place Stores, a former US chain of discount stores
• Philip Morris USA, abbreviated as PM USA, American tobacco company
• IATA airline designator for Tropic Air
• Pobjoy Mint, a European mint, via its mint mark PM
• Precious metals, like gold, silver and platinum
• Portfolio management, decisions regarding asset investments
• Project management, planning and organizing to achieve a one-time set of goals
• Program management, the process of managing several related projects
• Product management, the planning and marketing of a commercial product
• Performance management, ensuring that business goals are being met in an effective and efficient manner
• Preventive maintenance, procedures to avoid major equipment failures
• Private Message

Media

• 3pm, a former New Zealand children's TV programme
• PM (Australian radio program), an ABC radio news program
• PM (BBC Radio 4), a British radio news programme
• PM (newspaper), an American newspaper (1940–1948)
• PM Magazine, an American TV news program (1976–1991)
• Popular Mechanics, a long-running magazine now owned by the Hearst Corporation

Transport

• Martin PM, a version of the Naval Aircraft Factory PN flying boat
• Pere Marquette Railway, formerly operated in US and Canada (1900–1947)
• Toyota PM, a concept car
• Pm36, a Polish steam locomotive
• PM3, a Blue Origin propulsion module for a suborbital rocket

Weapons

• PM-38, Soviet light mortar
• PM-43, Finnish anti-personnel mine
• PM-63 RAK, Polish submachine gun
• PM-60, East German anti-tank mine
• PM-68, Finnish anti-personnel mine
• PM-79, Bulgarian anti-personnel mine
• PM-84 Glauberyt, Polish submachine gun
• PM md 96, Romanian submachine gun
• Makarov PM (Pistolet Makarova), a 1940s Soviet pistol
• Minebea PM-9, Japanese submachine gun

Music

• 2PM, a six-member boy band from South Korea
• 4 P.M., an American male R&B group
• Palm mute, a playing technique for the guitar or bass guitar
• Penn Masala, a Hindi a cappella group from the University of Pennsylvania, USA
• Pipe major, the director of bagpipe music in a Scottish or Irish pipe band
• P.M. Dawn, American hip-hop act
• Power Metal, a subgenre of heavy metal music
• Phil Manansala, the lead guitarist of American metalcore band Of Mice & Men

Other

• PM-1, PM-2A, PM-3A, Portable, Medium-power nuclear reactors developed by US Army
• Palace Museum, a large art museum housed in the Forbidden City in Beijing
• Polar Medal, a medal awarded by the Sovereign of the United Kingdom
• Bureau of Political-Military Affairs, in the U.S. Department of State
• Passage meditation, a form of meditation developed by Eknath Easwaran
• Palestine Monitor, a pro-Palestine group that documents Palestinian suffering
• Princess Margaret Cancer Centre, a scientific institute in Toronto, Canada
• Polícia Militar, Brazilian military police

See also

• All pages with titles beginning with Pm
• All pages with titles beginning with PM
• All pages with titles containing pm