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 as ...

, 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) (born 1981), or Stefon Alexander, American hip hop artist *

Pain of Salvation Pain of Salvation is a Swedish progressive metal band led by Daniel Gildenlöw, who is the band's main songwriter, lyricist, guitarist, and vocalist. Pain of Salvation's sound is characterised by riff-oriented guitar work, a broad vocal range, o ...

, Swedish progressive metal band * Posdnuos (born 1969), or Kelvin Mercer, New York hip-hop artist

Places

* Port of Spain, Trinidad and Tobago *

Piarco International Airport Piarco International Airport is an international airport serving the island of Trinidad and is one of two international airports in Trinidad and Tobago. The airport is located east of Downtown Port of Spain, located in the adjacent town of P ...

(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, 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 speakin ...

, in statistics *

Product of sums In Boolean algebra, any Boolean function can be expressed in the canonical disjunctive normal form ( CDNF) or minterm canonical form and its dual canonical conjunctive normal form ( CCNF) or maxterm canonical form. Other canonical forms inclu ...

, a canonical form in Boolean algebra

Computing

* P/OS, operating system of DEC Professional PCs from Digital Equipment Corporation *

Packet over SONET/SDH Packet over SONET/SDH, abbreviated POS, is a communications protocol for transmitting packets in the form of the Point to Point Protocol (PPP) over SDH or SONET, which are both standard protocols for communicating digital information using lase ...

, 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 Proof of space (PoS) is a type of consensus algorithm achieved by demonstrating one's legitimate interest in a service (such as sending an email) by allocating a non-trivial amount of memory or disk space to solve a challenge presented by the serv ...

, a cryptocurrency blockchain distributed consensus method *

Proof of stake Proof-of-stake (PoS) protocols are a class of consensus mechanisms for blockchains that work by selecting validators in proportion to their quantity of holdings in the associated cryptocurrency. This is done to avoid the computational cost of ...

, a cryptocurrency blockchain distributed consensus method

Transportation

Post Office Sorting Van A Post Office sorting van is a type of rail vehicle built for use in a Travelling Post Office. British Rail British Railways (BR), which from 1965 traded as British Rail, was a state-owned company that operated most of the overground rail ...

, a type of rail vehicle used in a Travelling Post Office train *

SNCF TGV POS The TGV POS is a TGV train built by French manufacturer Alstom which is operated by the French national rail company, the SNCF, in France's high-speed rail lines. It was originally ordered by the SNCF for use on the new LGV Est, which was put i ...

, 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, location where payment is accepted *

Point of service plan A point of service plan is a type of managed care health insurance plan in the United States. It combines characteristics of the health maintenance organization (HMO) and the preferred provider organization (PPO). The POS is based on a managed c ...

, a type of managed care health insurance plan in the US *

Polytechnic Secondary School The polytechnic secondary school, officially ''ten-class general educational polytechnic secondary school'', abbreviation POS, pronounced P-O-S, was the standard type of school in the school system of East Germany. The POS was established in 1959 ...

(''Polytechnische Oberschule''), the 10-year general educational system in East Germany *

Priory of Sion The ''Prieuré de Sion'' (), translated as Priory of Sion, was a fraternal organization founded in France in 1956 by Pierre Plantard in his failed attempt to create a prestigious neo-chivalric order. In the 1960s, Plantard began claiming that ...

, a fictitious secret society * Public open space, a planning term for an outdoor public forum