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. 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 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 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 A portfolio manager (PM) is a professional responsible for making investment decisions and carrying out investment activities on behalf of vested individuals or institutions. Clients invest their money into the PM's investment policy for future gr ...

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 A product manager (PM) is a professional role that is responsible for the development of products for an organization, known as the practice of product management. Product managers own the product strategy behind a product (physical or digital), ...

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 The Bureau of Political-Military Affairs (PM) is an agency within the United States Department of State that bridges the Department of State with the Department of Defense. It provides policy in the areas of international security, security assi ...

), 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. (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 Pharmacogenomics is the study of the role of the genome in drug response. Its name ('' pharmaco-'' + ''genomics'') reflects its combining of pharmacology and genomics. Pharmacogenomics analyzes how the genetic makeup of an individual affects the ...

, a term used in pharmacogenomics to refer to individuals with little to no functional metabolic activity *

Post-mortem An autopsy (post-mortem examination, obduction, necropsy, or autopsia cadaverum) is a surgical procedure that consists of a thorough examination of a corpse by dissection to determine the cause, mode, and manner of death or to evaluate any dis ...

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 Powder metallurgy (PM) is a term covering a wide range of ways in which materials or components are made from metal powders. PM processes can reduce or eliminate the need for subtractive processes in manufacturing, lowering material losses and r ...

, 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 A Perl module is a discrete component of software for the Perl programming language. Technically, it is a particular set of conventions for using Perl's package mechanism that has become universally adopted. A module defines its source code to b ...

, file extension .pm *

Private message In computing, a private message, personal message, or direct message (abbreviated as PM or DM) refers to a private communication sent or received by a user of a private communication channel on any given platform. Unlike public posts, PMs are only ...

, 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 order of magnitude, 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^ ...

, 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 The Naval Aircraft Factory PN was a series of open cockpit American flying boats of the 1920s and 1930s. A development of the Felixstowe F5L flying boat of the First World War, variants of the PN were built for the United States Navy by Doug ...

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 The Makarov pistol or PM ( rus, Пистоле́т Мака́рова, r=Pistolét Makárova, p=pʲɪstɐˈlʲet mɐˈkarəvə, t=Makarov's Pistol) is a Soviet semi-automatic pistol. Under the project leadership of Nikolay Fyodorovich Makarov, it ...

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

PM-84 Glauberyt The PM-84 Glauberyt is a Polish submachine gun. It is a personal weapon intended for combat and self-defence at ranges up to 150 m with single shot or fully automatic fire mode. It features a compact design, minimum overall dimensions, smal ...

, Polish submachine gun * PM md 96, 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 Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission. It encodes a message signal as variations in the instantaneous phase of a carrier wave. Phase modulation is one of the two principal forms ...

, 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 Plus may refer to: Mathematics * Addition * +, the mathematical sign Music * ''+'' (Ed Sheeran album), (pronounced "plus"), 2011 * ''Plus'' (Cannonball Adderley Quintet album), 1961 * ''Plus'' (Matt Nathanson EP), 2003 * ''Plus'' (Martin Ga ...

sign, a symbol used in mathematics

Other uses

Passage Meditation ''Passage Meditation'' is a book by Eknath Easwaran, originally published in 1978 with the title ''Meditation''. The book describes a meditation program, also now commonly referred to as Passage Meditation. Easwaran developed this method of meditati ...

, 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