POS, Pos or PoS may refer to:

Linguistics

Part of speech In grammar, a part of speech or part-of-speech (abbreviated as POS or PoS, also known as word class or grammatical category) is a category of words (or, more generally, of lexical items) that have similar grammatical properties. Words that are assi ...

, the role that a word or phrase plays in a sentence *

Poverty of the stimulus Poverty of the stimulus (POS) is the controversial argument from linguistics that children are not exposed to rich enough data within their linguistic environments to acquire every feature of their language. This is considered evidence contrary to ...

, a linguistic term used in language acquisition and development *

Sayula Popoluca Sayula Popoluca, also called Sayultec, is a Mixe language spoken by around 5,000 indigenous people in and around the town of Sayula de Alemán in the southern part of the state of Veracruz, Mexico. Almost all published research on the language ha ...

(ISO 639-3), an indigenous language spoken in Veracruz, Mexico

Music

P.O.S (rapper) Stefon Leron Alexander (born August 18, 1981), better known by his stage name P.O.S, is an American hip hop artist from Minneapolis. He has been a member of groups such as Doomtree, Building Better Bombs, Gayngs, Marijuana Deathsquads, Cenospec ...

(born 1981), or Stefon Alexander, American hip hop artist * Pain of Salvation, Swedish progressive metal band *

Posdnuos Kelvin Mercer (born August 17, 1969), also known by his stage name Posdnuos and occasionally Pos, is an American rapper and producer from East Massapequa, New York best known for his work as one-third of the hip hop trio De La Soul. Through ...

(born 1969), or Kelvin Mercer, New York hip-hop artist

Places

Port of Spain Port of Spain (Spanish: ''Puerto España''), officially the City of Port of Spain (also stylized Port-of-Spain), is the capital of Trinidad and Tobago and the third largest municipality, after Chaguanas and San Fernando. The city has a municip ...

, Trinidad and Tobago * Piarco International Airport (IATA code), Piarco, Trinidad and Tobago *

Pomona (Amtrak station) Pomona station, also called Pomona–Downtown station, ( ) is a train station in Pomona, California, United States. Amtrak's '' Sunset Limited'' between Los Angeles and New Orleans and ''Texas Eagle'' between Los Angeles and Chicago via Texas, a ...

(Amtrak station code), California, US

Science and technology

Political opportunity structure Political opportunity theory, also known as the political process theory or political opportunity structure, is an approach of social movements that is heavily influenced by political sociology. It argues that success or failure of social movement ...

, an approach to explain social movements *

Polycystic ovary syndrome Polycystic ovary syndrome, or PCOS, is the most common endocrine disorder in women of reproductive age. The syndrome is named after the characteristic cysts which may form on the ovaries, though it is important to note that this is a sign and no ...

, a disease of the ovaries *

Probability of success Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, ...

, in statistics * Product of sums, a canonical form in Boolean algebra

Computing

* P/OS, operating system of DEC Professional PCs from Digital Equipment Corporation * Packet over SONET/SDH, a communications protocol for transferring packets over fiber networks *

PERQ Operating System The PERQ, also referred to as the Three Rivers PERQ or ICL PERQ, was a pioneering workstation computer produced in the late 1970s through the early 1980s. In June 1979, the company took its very first order from the UK's Rutherford Appleton L ...

, operating system for PERQ workstations * Proof of space, a cryptocurrency blockchain distributed consensus method * Proof of stake, a cryptocurrency blockchain distributed consensus method

Transportation

* Post Office Sorting Van, a type of rail vehicle used in a Travelling Post Office train * SNCF TGV POS, a French high-speed train

Other uses

Phi Omega Sigma (disambiguation) Phi Omega Sigma may refer to the six unrelated student organizations: *Phi Omega Sigma (College of Wooster) at The College of Wooster, Ohio, United States (founded in 1913, de-chartered in 2017) *Phi Omega Sigma Christian Fraternity, Inc., a co-ed ...

, a Greek name for any of five different student organizations *

Piece of shit ''Shit'' is a word considered to be vulgar and profane in Modern English. As a noun, it refers to fecal matter, and as a verb it means to defecate; in the plural ("the shits"), it means diarrhea. ''Shite'' is a common variant in British an ...

, a phrase considered vulgar and profane in Modern English *

Point of sale The point of sale (POS) or point of purchase (POP) is the time and place at which a retail transaction is completed. At the point of sale, the merchant calculates the amount owed by the customer, indicates that amount, may prepare an invoice f ...

, location where payment is accepted * Point of service plan, a type of managed care health insurance plan in the US * Polytechnic Secondary School (''Polytechnische Oberschule''), the 10-year general educational system in East Germany * Priory of Sion, a fictitious secret society * Public open space, a planning term for an outdoor public forum