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, 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. Origin ...

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

PM Press PM Press is an independent publisher, founded in 2007, that specializes in radical, Marxist and anarchist literature, as well as crime fiction, graphic novels, music CDs, and political documentaries. It has offices in the San Francisco Bay Area ...

, an American publishing company * Project Mayhem, 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.

Business and economics

Businesses

P.M. Place Stores P.M. Place Stores, also known as Place's Discount Stores was a Bethany, Missouri-based, employee-owned chain of discount stores in the United States. The company primarily operated in towns with a population of 1,500 to 4,000 people in Illinois, ...

, a former US chain of discount stores *

Pere Marquette Railway The Pere Marquette Railway operated in the Great Lakes region of the United States and southern parts of Ontario in Canada. It had trackage in the states of Michigan, Ohio, Indiana and the Canadian province of Ontario. Its primary connections in ...

, North America 1900–1947, reporting mark *

Philip Morris International Philip Morris International Inc. (PMI) is an American multinational tobacco company, with products sold in over 180 countries. The most recognized and best selling product of the company is Marlboro. Philip Morris International is often refe ...

, a tobacco company

Terminology

Performance management Performance management (PM) is the process of ensuring that a set of activities and outputs meets an organization's goals in an effective and efficient manner. Performance management can focus on the performance of a whole organization, a d ...

of an organisation * Portfolio manager *

Preventive maintenance The technical meaning of maintenance involves functional checks, servicing, repairing or replacing of necessary devices, equipment, machinery, building infrastructure, and supporting utilities in industrial, business, and residential installa ...

Project manager A project manager is a professional in the field of project management. Project managers have the responsibility of the planning, procurement and execution of a project, in any undertaking that has a defined scope, defined start and a defined fi ...

* Product manager

Government

Prime minister A prime minister, premier or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. Under those systems, a prime minister is ...

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

People

P.M. (author) 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. PM or Pm or pm may also refer to: Arts and entertainment *Palm mute#Notation, Palm mute, a guitar playing technique ...

or p.m., pseudonym of Hans Widmer (born 1947), Swiss author *

Pat Maloney Sr. Pat Maloney Sr. (August 9, 1924 – September 11, 2005), also known as PM, was an American trial lawyer. Based in San Antonio, Texas, Maloney was a "firebrand plaintiffs' lawyer known as the king of torts."Carmina DaniniPat Maloney Sr., King of T ...

(1924–2005), American trial lawyer

Science, technology, and mathematics

Biology and medicine

Plasma membrane The cell membrane (also known as the plasma membrane (PM) or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates and protects the interior of all cells from the outside environment (t ...

, also known as cell membrane *

Polymyositis Polymyositis (PM) is a type of chronic inflammation of the muscles ( inflammatory myopathy) related to dermatomyositis and inclusion body myositis. Its name means "inflammation of many muscles" (''poly-'' + '' myos-'' + ''-itis''). The inflammat ...

, a disease * Poor metabolizer, a term used in pharmacogenomics to refer to individuals with little to no functional metabolic activity * Post-mortem *

Precision medicine Precision, precise or precisely may refer to: Science, and technology, and mathematics Mathematics and computing (general) * Accuracy and precision, measurement deviation from true value and its scatter * Significant figures, the number of digit ...

Chemistry and materials science

*Parametric Method 3 (

PM3 (chemistry) PM3, or Parametric Method 3, is a semi-empirical method for the quantum calculation of molecular electronic structure in computational chemistry. It is based on the Neglect of Differential Diatomic Overlap integral approximation. The PM3 m ...

), in computational chemistry *

Particulate matter Particulates – also known as atmospheric aerosol particles, atmospheric particulate matter, particulate matter (PM) or suspended particulate matter (SPM) – are microscopic particles of solid or liquid matter suspended in the air. The t ...

, microscopic particles suspended in the air **

PM10 Particulates – also known as atmospheric aerosol particles, atmospheric particulate matter, particulate matter (PM) or suspended particulate matter (SPM) – are microscopic particles of solid or liquid matter suspended in the air. Th ...

, particulates smaller than 10 μm * Powder metallurgy, a method of fabricating metals *

Promethium Promethium is a chemical element with the symbol Pm and atomic number 61. All of its isotopes are radioactive; it is extremely rare, with only about 500–600 grams naturally occurring in Earth's crust at any given time. Promethium is one of onl ...

, 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 ''Paper Mario'' is a video game series and part of the ''Mario'' franchise, developed by Intelligent Systems and produced by Nintendo. It combines elements from the role-playing, action-adventure, and puzzle genres. Players control a pap ...

'', a 2001 video game *The ''

'' series

Units of measurement

Petameter The following are examples of orders of magnitude for different lengths. __TOC__ Overview Detailed list To help compare different orders of magnitude, the following list describes various lengths between 1.6 \times 10^ metres and 10^ ...

, a length unit (10¹⁵ m) (Pm) *

Picometre The picometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: pm) or picometer ( American spelling) is a unit of length in the International System of Units (SI), equal to , or one trillionth ...

, a length unit (10⁻¹² m) (pm) *Picomolar (pM), a unit of

molar concentration Molar concentration (also called molarity, amount concentration or substance concentration) is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of sol ...

Vehicles

*Martin PM, a version of the Naval Aircraft Factory PN flying boat * Toyota PM, a concept car * Pm36, a Polish steam locomotive * 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 The Minebea PM-9 Submachine Gun, known officially in the Japan Self-Defense Forces (JSDF) as the or as the M9, is a Japanese-made machine pistol. Analogous to the Israeli IMI Mini-Uzi, it has the same telescoping bolt as the Mini-Uzi, but dif ...

, a Japanese submachine gun *

PM-38 The RM-38 was a Soviet Union, Soviet 50 mm light infantry Mortar (weapon), mortar. The barrel was clamped at two elevation angles only - 45 and 75 degrees. Range variations were made by altering a sleeve round the base of the barrel. This sle ...

, a Soviet light mortar * PM-63 RAK, Polish submachine gun * PM-84 Glauberyt, Polish submachine gun *

PM md 96 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. PM or Pm or pm may also refer to: Arts and entertainment *Palm mute, a guitar playing technique * ''PM'' (Australia ...

, a Romanian submachine gun *Precision Marksman (PM), a sniper rifle and precursor to the

accuracy international arctic warfare The Accuracy International Arctic Warfare rifle is a bolt-action sniper rifle designed and manufactured by the British company Accuracy International. It has proved popular as a civilian, police, and military rifle since its introduction in th ...

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

* PM-1, PM-2A, PM-3A, US Army portable nuclear reactors * Phase modulation, in signal processing *

Polarization-maintaining optical fiber In fiber optics, polarization-maintaining optical fiber (PMF or PM fiber) is a single-mode optical fiber in which linearly polarized light, if properly launched into the fiber, maintains a linear polarization during propagation, exiting the ...

or PM fiber *''

Principia Mathematica The ''Principia Mathematica'' (often abbreviated ''PM'') is a three-volume work on the foundations of mathematics written by mathematician–philosophers Alfred North Whitehead and Bertrand Russell and published in 1910, 1912, and 1913. ...

'', by Whitehead and Russell *The 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 Saint Pierre and Miquelon (), officially the Territorial Collectivity of Saint-Pierre and Miquelon (french: link=no, Collectivité territoriale de Saint-Pierre et Miquelon ), is a self-governing territorial overseas collectivity of France in t ...

(ISO 3166-1 alpha-2 country code) **

.pm .pm is the country code top-level domain (ccTLD) for Saint Pierre and Miquelon. It is managed by AFNIC, with registration services opening on 6 December 2011. As of June 2021, there are more than 7000 registered .pm domains. British Domain H ...

, top-level domain (ccTLD) for Saint Pierre and Miquelon