PSP may refer to: Organisations Politics Pak Sarzameen Party, a defunct political party in Pakistan Pacifist Socialist Party (Dutch: Pacifistisch Socialistische Partij), a former Dutch political party Partido Socialista Popular (Cuba) People's Services Party, a political party in Vanuatu Popular Socialist Party (Argentina) (), a former political party in Argentina Popular Socialist Party, a post World War II Socialist Party of Chile Popular Socialist Party (Haiti) (), a former communist political party in Haiti Popular Socialist Party (Mexico) (, PPS), a communist party in Mexico Popular Socialist Party (Spain) (), a former Spanish political party that has merged with the Spanish Socialist Workers' Party (PSOE) Praja Socialist Party, a former Indian political party Progress Singapore Party, a political party in Singapore Progressive Socialist Party (, al-hizb al-taqadummi al-ishtiraki), a political party in Lebanon Progressive Socialist Party of Ukraine (, Prohresivna Sotsjalistychna Partiya Ukrayiny), a political party in Ukraine Progressive Sudanese Party (), a former political party in French Sudan (now Mali) Puerto Rican Socialist Party (), a former political party in Puerto Rico Education Pittsburgh Scholars Program of the Perry Traditional Academy, Pennsylvania, US Professional School of Psychology, Sacramento, California, US Government Państwowa Straż Pożarna, State Fire Service in Poland Pennsylvania State Police, US Polícia de Segurança Pública (Public Security Police), Portugal Public Sector Pension Investment Board Computing PlayStation Portable, Sony handheld game console PaintShop Pro, a graphics editor Parallel slave port on some PIC microcontrollers Personal software process, to improve programming quality Program Segment Prefix, used in DOS systems to store the state of a program Python Server Pages, for embedding Python in HTML AMD Platform Security Processor Engineering Pierced steel planking Pneumatic stabilized platform, for large floating structures Firearms Heckler & Koch P7, also known as PSP, "Police Self-loading Pistol" Plated Soft Point, and Pointed Soft Point, types of bullet Science and medicine Paralytic shellfish poisoning Parker Solar Probe Pathological skin picking Phenolsulfonphthalein (phenol red), a pH indicator Photostimulable phosphor plate, or image plate, recording X-rays Polydiethylstilbestrol phosphate, a nonsteroidal estrogen Polysaccharide peptide, a protein-bound sugar polymer Postsynaptic potential, the voltage of nerves Pressure-sensitive paint Progressive supranuclear palsy of the brain, a degenerative disease Pseudoprime, a non-prime which passes a probabilistic primality test Other Palm Springs International Airport, IATA airport code Payment service provider Personal Public Service Number (Irish: Uimhir Phearsanta Seirbhíse Poiblí, or Uimh. PSP), Ireland Philippine Sign Language, by ISO 639-3 language code Physical Security Professional