PM, Pm or pm can refer to:

• PM (newspaper), a politically leftist U.S. newspaper in the late 1940s and early 1950s
• PM (Radio 4), a BBC Radio 4 newsmagazine
• PM (Radio National), an ABC Radio National newsmagazine
• Particulate matter, fine dust and soot suspended in the air
• Pere Marquette Railroad (AAR reporting mark PM)
• Perl module
• Project manager or Project management
• Perry Mason
• Personal message
• Petametre, a length unit (10¹⁵ m) (Pm)
• Phase modulation, in electrical engineering
• Phonoflux Metaflux: A less-known musicion in the electronica / psychedelic / industrial category using the alias as a name / abbreviation for 'phonoflux metaflux'. The musician's real name is Kwin L. His music can be found at the following address: ^*
• Picometre, a length unit (10^-12 m) (pm)
• Saint-Pierre and Miquelon: ISO 3166-1 alpha-2 country code
• Pontifex Maximus, The Pope (P·M·)
• Postmaster
• Post meridiem (also written P.M. and pm), Latin for "after noon". This is used to disambiguate hours of the day, in the 12-hour clock system
• postmortem
• Precious metal
• Preventive maintenance
• Prime minister, in government
• Principia Mathematica, in set theory
• Private Message, on Internet forums.
• Promethium, in chemistry (Pm)
• Palm mute, in guitar tablature
• PM is the mint mark of the Pobjoy Mint
• P.M. Pubblico Ministero italian magistrate office
• Tropic Air IATA airline designator

In games:

• Paper Mario, a video game by Nintendo
• The Thousand Year Door, the sequel to the above game.
• Pocket Monsters
• Planetarium Manager, the browser-based game

Pm | PM (flertydig) | Pm | Pm | PM | PM | PM | PM | PM | PM