PM

Look up PM, Pm, pm, or p.m. in Wiktionary, the free dictionary.

PM (also written pm or p.m.) often means "After noon" in the 12-hour clock (Latin Post meridiem).

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)
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 personal/private 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
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
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