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

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

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

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

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

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