PM or pm (also written P.M. or p.m.) is an abbreviation for Latin ''post meridiem'', meaning "after midday" in the

12-hour clock The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin , translating to "before midday") and p.m. (from Latin , translating to "after midday"). For different opinions on represen ...

. PM or Pm or pm may also refer to:

Arts and entertainment

Palm mute The palm mute is a playing technique for guitar and bass guitar, executed by placing the side of the picking hand below the little finger across the strings to be plucked, very close to the bridge, and then plucking the strings while the damp ...

, a guitar playing technique * ''PM'' (Australian radio program) * ''PM'' (BBC Radio 4), UK *''

PM Magazine ''PM/Evening Magazine'' is a television series with a news and entertainment format. It was syndicated to stations throughout the United States. In most areas, ''Evening/PM Magazine'' was broadcast from the late 1970s into the late 1980s. Origi ...

'', an American TV news program (1976–1991). * ''PM'' (newspaper), US (1940–1948) * PM Press, an American publishing company *

Project Mayhem ''Fight Club'' is a 1996 novel by Chuck Palahniuk. It follows the experiences of an Anonymity, unnamed protagonist struggling with insomnia. Inspired by his doctor's exasperated remark that insomnia is not suffering, the protagonist finds relief ...

, a “fictional conspiracy” created in the Chuck Palahniuk 1996 novel Fight Club and 1999 movie of the same name * PM a rock band featuring british drummer

Carl Palmer Carl Frederick Kendall Palmer (born 20 March 1950) is an English drummer best known as founding member and the last surviving member of the progressive rock supergroup Emerson, Lake & Palmer. He was also a founding member of progressive rock s ...

Business and economics

Businesses

*P.M. Place Stores, a former US chain of discount stores *Pere Marquette Railway, North America 1900–1947, reporting mark *Philip Morris International, a tobacco company

Terminology

*Performance management of an organisation *Portfolio manager *Preventive maintenance *Project manager *Product manager

Government

*Prime minister *Military Police (Brazil), Polícia Militar, Brazilian military police *Political-Military (Bureau of Political-Military Affairs), in the U.S. Department of State

People

*Hans Widmer, P.M. (author) or p.m., pseudonym of Hans Widmer (born 1947), Swiss author *Pat Maloney Sr. (1924–2005), American trial lawyer

Science, technology, and mathematics

Biology and medicine

*Plasma membrane, also known as cell membrane *Polymyositis, a disease *Poor metabolizer, a term used in pharmacogenomics to refer to individuals with little to no functional metabolic activity *Post-mortem *Precision medicine

Chemistry and materials science

*Parametric Method 3 (PM3 (chemistry)), in computational chemistry *Particulate matter, microscopic particles suspended in the air **PM10, particulates smaller than 10 μm *Powder metallurgy, a method of fabricating metals *Promethium, symbol Pm, a chemical element

Computing

*Particle mesh, an algorithm for determining forces *Perl module, file extension .pm *Private message, a private communication channel on a some platforms

Video games

*''Paper Mario (video game), Paper Mario'', a 2001 video game *The ''Paper Mario'' series

Units of measurement

*Petameter, a length unit (10¹⁵ m) (Pm) *Picometre, a length unit (10⁻¹² m) (pm) *Picomolar (pM), a unit of Molar concentration#Units, molar concentration

Vehicles

*Martin PM, a version of the Naval Aircraft Factory PN flying boat *Toyota PM, a concept car *PKP class Pm36, Pm36, a Polish steam locomotive *Blue Origin propulsion module, PM3, a Blue Origin propulsion module for a suborbital rocket

Weapons

Guns and mortars

*Makarov PM (Pistolet Makarova), a Soviet and Russian pistol *Minebea PM-9, a Japanese submachine gun *PM-38, a Soviet light mortar *PM-63 RAK, Polish submachine gun *PM-84 Glauberyt, Polish submachine gun *PM md 96, a Romanian submachine gun *Precision Marksman (PM), a sniper rifle and precursor to the accuracy international arctic warfare rifle

Mines

*PM-43 and PM-68 mine, Finnish anti-personnel mines *PM-60 mine, an East German anti-tank mine *PM-79 mine, a Bulgarian anti-personnel mine

Other uses in science, technology, and mathematics

*Army Nuclear Power Program, PM-1, PM-2A, PM-3A, US Army portable nuclear reactors *Phase modulation, in signal processing *Polarization-maintaining optical fiber or PM fiber *''Principia Mathematica'', by Whitehead and Russell *The plus–minus sign, plus or minus sign, a symbol used in mathematics

Other uses

*Passage Meditation, a form of meditation developed by Eknath Easwaran *Saint Pierre and Miquelon (ISO 3166-1 alpha-2 country code) **.pm, top-level domain (ccTLD) for Saint Pierre and Miquelon