PM
272347
224113274
2008-07-07T11:04:02Z
Nurg
28564
There is no article called "Post Meridiem" - the article is called "12-hour clock" - moved it to the top
{{wiktionarypar4|PM|Pm|pm|p.m.}}
'''PM''', '''Pm''', '''pm''' or '''p.m.''' can refer to:
===Time===
* ''Post meridiem'' (also written P.M., p.m., and pm), "after noon" in the [[12-hour clock]], in contrast to ''ante meridiem'' (a.m., "before noon")
===Science===
* Particulate matter, [[particulate]]s — fine dust and soot — suspended in the air
* [[Permanent magnet]], an object which stays magnetised without external effort
* [[Perpetual motion]], refers to movement that goes on forever
* [[Petametre]], a length unit (10<sup>15</sup> m) (Pm)
* [[Phase modulation]], in electrical engineering
* [[Picometre]], a length unit (10<sup>-12</sup> 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
* [[Precious metal]], a rare metallic chemical element of high economic value
* [[Promethium]], chemical element number 61 (Pm)
===Medicine===
* [[Polymyositis]]
* [[Post mortem]], a medical examination carried out after death
===Mathematics===
* [[Principia Mathematica]], a three-volume work on the foundations of mathematics
===Computing===
* [[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
* [[Personal message]] or private message, in the context of bulletin board systems and Internet forums
===Politics===
* [[Pontifex Maximus]], the high priest of the Ancient Roman College of Pontiffs
* [[Prime minister]], the most senior minister of a cabinet
===Economy===
* [[Altria Group]], previously named "Phillip Morris"
* [[Pobjoy Mint]], a European mint, via its mint mark "PM"
* [[Postmaster]], the head of an individual post office
* [[Project manager]] or project management, the discipline of organizing and managing resources
* [[Power Machines]] or Silmash, a Russian industrial company
===Literature===
* [[Perry Mason]], a fictional defense attorney
* ''[[The Peoples of Middle-earth]]'' by Christopher Tolkien
* ''[[Popular Mechanics]]'', an American magazine devoted to science and technology
* [[P.M. (author)]], an anonymous Swiss author
===Media===
* [[PM (Radio 4)]], a BBC Radio 4, a news and current affairs programme
* [[PM (ABC Radio)]], an ABC Radio national news magazine programme
* [[PM (newspaper)]], a politically leftist U.S. newspaper in the 1940s
===Other===
* [[Palm mute]], in guitar tablature
* [[Pere Marquette Railway]] (Association of American Railroads reporting mark PM)
* [[Makarov PM]] (Pistolet Makarova), a semi-automatic pistol designed in the late 1940s
* [[Polar Medal]], a medal awarded by the Sovereign of the United Kingdom
* [[Preventive maintenance]], preventative maintenance or proactive maintenance, the care and servicing of equipment for the purpose of maintaining it in satisfactory operating condition
* [[Saint-Pierre and Miquelon]]: ISO 3166-1 alpha-2 country code
* [[Tropic Air]] IATA airline designator
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