Computing and programming

• Corel Paint Shop Pro
  Corel Paint Shop Pro
  Paint Shop Pro is a raster graphics editor and, later in the series, a vector graphics editor for computers running the Microsoft Windows operating system that was originally published by Minneapolis-based Jasc Software. In October 2004, Corel Corporation purchased Jasc Software and the...
  
  , a graphics editor
• Parallel slave port
  Parallel slave port
  A parallel slave port is an interface found on some PIC microcontrollers. It allows 8-bit asynchronous bidirectional data transfer between the PIC and external devices, such as other microcontrollers or personal computers....
  
  , a data interface on some PIC microcontrollers
  PIC microcontroller
  PIC is a family of Harvard architecture microcontrollers made by Microchip Technology, derived from the PIC1650 originally developed by General Instrument's Microelectronics Division...
  
  
• Personal Software Process
  Personal Software Process
  The Personal Software Process is a structured software development process that is intended to help software engineers understand and improve their performance, by using a "disciplined, data-driven procedure"...
  
  , a process to improve programming quality
• Program Segment Prefix
  Program Segment Prefix
  The Program Segment Prefix is a data structure used in DOS systems to store the state of a program. It resembles the Zero Page in the CP/M operating system...
  
  , a data structure used in DOS systems to store the state of a program
• Python Server Pages
  Python Server Pages
  Python Server Pages is a name used by several different implementations of server-side script engines for creating dynamically-generated web pages by embedding Python in HTML...
  
  , a variety of implementations of a mechanism for embedding Python in HTML
• PSP codec, a program capable of encoding and/or decoding a digital data stream for the H.264 standard for video compression
• Pit Signal Processing, a copy protection measure used on Super Audio CDs

Education

• Pittsburgh Scholars Program, an educational program at the Perry Traditional Academy in Pittsburgh, Pennsylvania, United States
• Professional School of Psychology
  Professional School of Psychology
  The Professional School of Psychology is a graduate school of clinical and organizational psychology headquartered in Sacramento, California, USA. It has its roots in Huckleberry House, San Francisco, 1979....
  
  , a graduate school of clinical and organization psychology in Sacramento, California, United States

Engineering

• Pierced steel planking - properly known as Marsden Matting
  Marsden Matting
  Marsden Matting is standardized, perforated steel matting material originally developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the rapid construction of temporary runways and landing strips...
  
  , matting material made of perforated steel
• Pneumatic stabilized platform
  Pneumatic stabilized platform
  A Pneumatic stabilized platform is a technology used to float a very large floating structure .PSP utilizes indirect displacement, in which a platform rests on trapped air that displaces the water. The primary buoyancy force is provided by air pressure acting on the underside of the deck...
  
  , a technology for very large floating structures

Firearms

• HK PSP, the Heckler & Koch Police Self-loading Pistol
• Bullet types:
  • Plated Soft Point bullet
  • Pointed Soft Point bullet

Government

• Police Service of Pakistan
• Personal Public Service Number
  Personal Public Service Number
  The Personal Public Service Number is an identifier issued by Client Identity Services, Department of Social and Family Affairs on behalf of the Minister for Social and Family Affairs in Ireland....
  
   (Irish: Uimhir Phearsanta Seirbhíse Poiblí, or Uimh. PSP), an identifier issued by Client Identity Services, Department of Social and Family Affairs on behalf of the Minister for Social and Family Affairs in Ireland
• Personal Support Programme, a pre-employment program of the Department of Education, Employment and Workplace Relations in Australia
• President's Surveillance Program
  President's Surveillance Program
  The President's Surveillance Program is a collection of secret intelligence activities authorized by then President of the United States George W. Bush after the September 11 attacks in 2001 as part of the War on Terrorism...
  
  , a classified American intelligence program instituted after the September 11 attacks

Political parties

• Pacifist Socialist Party
  Pacifist Socialist Party
  The Pacifist Socialist Party was a Dutch left-socialist political party. The PSP played a small role in Dutch politics. It is a predecessor of the GreenLeft.-Before 1957:...
  
   (Dutch: Pacifistisch Socialistische Partij), a former Dutch left-socialist political party and a predecessor of the GreenLeft
• Partido Socialista Popular (Cuba), the original "internationalized" Communist Party of Cuba, later renamed the Popular Socialist Party
• Popular Socialist Party (Argentina)
  Popular Socialist Party (Argentina)
  The Popular Socialist Party was a political party in Argentina formed in 1972 with the merger of the Argentine Socialist Party, the Movimiento de Acción Popular Argentino and other minor groups....
  
   , a former political party in Argentina
• Popular Socialist Party, a post World War II Socialist Party of Chile
• Popular Socialist Party (Haiti)
  Popular Socialist Party (Haiti)
  Popular Socialist Party was a communist political party in Haiti. PSP was founded in 1946. It was led by Anthony Lespès, and later Étienne Charlier. PSP took part in the presidential elections of 1946....
  
   , a former communist political party in Haiti
• Popular Socialist Party (Mexico)
  Popular Socialist Party (Mexico)
  The Popular Socialist Party is a communist party in Mexico. It was founded in 1948 as the Popular Party by Vicente Lombardo Toledano....
  
   , a communist party in Mexico
• Popular Socialist Party (Spain)
  Popular Socialist Party (Spain)
  The People's Socialist Party was a Spanish political party.The origins of the party dated back to 1954 when the University professor, Enrique Tierno Galván published various academic studies of a Marxist character. In 1965, working together with Raúl Morodo, he formed the Castillian Socialist...
  
   , a former Spanish political party that has merged with the Spanish Socialist Workers' Party (PSOE)
• Praja Socialist Party
  Praja Socialist Party
  The Praja Socialist Party was an Indian political party in existence from 1952 to 1972. It was founded when the Socialist Party, led by Jayprakash Narayan, Acharya Narendra Deva and Basawon Singh , merged with the Kisan Mazdoor Praja Party led by J.B. Kripalani...
  
  , a former Indian political party
• Progressive Socialist Party
  Progressive Socialist Party
  The Progressive Socialist Party or PSP , also known as Parti Socialiste Progressiste in French, is a political party in Lebanon. Its current leader is Walid Jumblatt...
  
   , a political party in Lebanon
• Progressive Socialist Party of Ukraine
  Progressive Socialist Party of Ukraine
  -Ideology:The party favoures Ukraine's full-scale entry in the Eurasian Economic Community ; the protection of the non-aligned status of Ukraine; abolition of NATO exercises in Ukraine; giving the Russian language status as official language along with Ukrainian; annulment of former President...
  
   , a political party in Ukraine
• Progressive Sudanese Party
  Progressive Sudanese Party
  Progressive Sudanese Party was a political party in French Soudan . The party was led by Fily Dabo Sissoko. Politically it represented a conservative traditionalist position, and drew support from traditional chiefs. It was founded in December 1945 by Sissoko, son of a canton chief, and Hamadoun...
  
   , a former political party in French Soudan (now Mali)
• Puerto Rican Socialist Party
  Puerto Rican Socialist Party
  The Puerto Rican Socialist Party was a Marxist and pro-independence political party in Puerto Rico seeking the end of United States of America control on the Hispanic and Caribbean island...
  
   , a former Marxist and pro-independence political party in Puerto Rico

Public safety

• Pennsylvania State Police
  Pennsylvania State Police
  The Pennsylvania State Police is the state police force of Pennsylvania, responsible for statewide law enforcement. It was founded in 1905 by order of Governor Samuel Pennypacker, in response to the private police forces used by mine and mill owners to stop worker strikes and the inability or...
  
  , the state police force of Pennsylvania, United States
• Physical Security Professional
  Physical Security Professional
  A Physical Security Professional is a certification process for individuals involved in the physical security of organizations. This certification process is offered by ASIS International...
  
  , a person with certification in physical security
• Public Security Police , the Portuguese police force that works in large urban areas

Science and medicine

• Paralytic shellfish poisoning
  Paralytic shellfish poisoning
  Paralytic shellfish poisoning is one of the four recognized syndromes of shellfish poisoning, which share some common features and are primarily associated with bivalve mollusks . These shellfish are filter feeders and, therefore, accumulate toxins produced by microscopic algae, such as...
  
  , one of the four recognized syndromes of shellfish poisoning
• Phenol red
  Phenol red
  Phenol red is a pH indicator that is frequently used in cell biology laboratories.-Chemical structure and properties:...
  
   (phenolsulfonphthalein), a pH indicator used in cell biology laboratories
• Photostimulable phosphor plate, also known as an image plate, a device used to record a two-dimensional image of the intensity of short-wavelength electromagnetic radiation
• Polysaccharide Peptide
  Polysaccharide Peptide
  Polysaccharide peptide is a protein-bound polysaccharide extracted from the edible mushroom Coriolus versicolor. PSP is currently in the animal-testing phase of research in many countries for use as an anti-tumor drug. It appears to work as a Biological Response Modifier, enhancing the body's own...
  
  , a protein-bound sugar polymer
• Postsynaptic potential
  Postsynaptic potential
  Postsynaptic potentials are changes in the membrane potential of the postsynaptic terminal of a chemical synapse. Postsynaptic potentials are graded potentials, and should not be confused with action potentials although their function is to initiate or inhibit action potentials...
  
  , a measure of the voltage of nerves
• Pressure-sensitive paint
  Pressure-sensitive paint
  Pressure-sensitive paint is a method for measuring air pressure, usually in aerodynamic settings. It is paint which fluoresces in differing intensities depending on the external air pressure being applied to its surface.-Where it is used:...
  
  , fluorescent paint used in aerodynamic testing
• Progressive supranuclear palsy
  Progressive supranuclear palsy
  Progressive supranuclear palsy is a degenerative disease involving the gradual deterioration and death of specific areas of the brain....
  
  , a degenerative disorder of the brain
• Polysaccharide-peptide (PS-P), the term used in China for Polysaccharide-K
  Polysaccharide-K
  Polysaccharide-K is a protein-bound polysaccharide, which is used as an immune system boosting agent in the treatment of cancer in some countries in Europe as well as China and Japan. In Japan, PSK is approved as an adjuvant for cancer therapy and is covered by government health insurance...
  
  
• Pseudoprime
  Pseudoprime
  In number theory, the Fermat pseudoprimes make up the most important class of pseudoprimes that come from Fermat's little theorem.- Definition :...
  
  , a special type of number in mathematics
• PSP model, a mathematical model describing the behavior of Metal–Oxide–Semiconductor field-effect transistors
• Pathelogical Skin Picking
  Dermatillomania
  Dermatillomania is an impulse control disorder characterized by the repeated urge to pick at one's own skin, often to the extent that damage is caused...
  
  , a compulsion to pick ones skin

Other

• Paintball Sports Promotions, a North American paintball league
• psp, the ISO 639-3 language code for Filipino Sign Language
  Filipino Sign Language
  Filipino Sign Language or Philippine Sign Language, is a form of manual and visual communication that utilize hand gestures. FSL is used by deaf individuals, people unable to communicate verbally and people who are FSL interpreters in the Philippines.FSL has a very strong influence from American...
  
   / Philippine Sign Language
• PSP, the IATA airport code for Palm Springs International Airport
  Palm Springs International Airport
  Palm Springs International Airport is a public airport located two miles east of the central business district of Palm Springs, California, serving the Inland Empire Metropolitan Area of Southern California. The airport covers and utilizes two runways...
  
  
• Payment Service Provider
  Payment Service Provider
  A payment service provider offers merchants online services for accepting electronic payments by a variety of payment methods including credit card, bank-based payments such as direct debit, bank transfer, and real-time bank transfer based on online banking...
  
  , a company which offers merchants the ability to accept payments
• Phi Sigma Pi
  Phi Sigma Pi
  Phi Sigma Pi is a national coeducational honor fraternity based in the United States. The fraternity is a 501 not-for-profit organization incorporated in the state of Pennsylvania, with the purpose of fostering the ideals of scholarship, leadership and fellowship...
  
  , a fraternity in the United States