Encyclopedia

P & P Cable Holdings P & P Cable Holdings, also known as NTN Saginaw, is a corporation in the United States that owns several low-power television stations. The company started in Michigan with one television station, W54DA (now WXON-LP).
P (complexity) In computational complexity theory, P is the complexity class containing decision problems which can be solved by a deterministic Turing machine using a polynomial amount of computation time, or polynomial time.
P 4 class torpedo boat P 4 class torpedo boat is the Soviet aluminum-hulled hydroplanes armed with 2 450 mm torpedoes. This class is thoroughly obsolete but did not completely retired from active service and placed in reserve until the mid 1990’s.
P and A Campbell P & A Campbell Ltd of Bristol with its White Funnel Fleet became the dominant excursion-steamer operator in the Bristol Channel by the 1890's; and along the South Coast of England in the first half of the twentieth century.
P convention The "-P Convention" or "P Question" refers to the act of making a statement into a question by appending "P." When spoken alound, the "P" is literally pronounced as a separate syllable "Pee.
P element A P element is a transposon that is present in the fruit fly Drosophila melanogaster and is used widely for mutagenesis and the creation of genetically modified flies used for genetic research. The P element causes a phenotype known as hybrid dysgenesis.
P Funk Earth Tour The P Funk Earth Tour was a series of lavish P Funk concerts conducted by the Parliament Funkadelic in the 1970s, featuring absurd costumes, outrageous special effects and stunts, and some good ole Funky music. The 1977 live album Live: P-Funk Earth Tour is from these concerts.
P J Magennis Pty Ltd v Commonwealth P J Magennis Pty Ltd v Commonwealth (1949) 80 CLR 382 is a High Court of Australia case that deals with the Commonwealth's power of acquisition of property, which must be on just terms, as specified in section 51(xxxi) of the Australian Constitution.
P K Kelkar library P K Kelkar Library (Formerly Central Library) is an academic Library of the Indian Institute of Technology, Kanpur (IITK) with a collection of more than 3,00,000 volumes and subscriptions to more than 1000 periodicals. The library was renamed to its present name in year 2003 after Dr.
P orbitals P orbitals are the second type of sub-shell to be found in an atom. They have the value l=1 (l being the second quantum number) and therefore have three different orientations, corresponding to the m values of 1,0,-1 (m being the third quantum number).
P Paul Verma P Paul Verma belong to Jalandhar, Punjab, India and is a well known Film Director, Film Producer and Story Writer, Screen Play and Dialogue writer of Punjabi and Hindi movies. He has directed Zameen Jatt di Jaan, which is to be released shortly and recently he bagged another Hindi Film Jag Daati Bakshanhaar as Director, which is going on the floors in February 2007.
P scale (Babylon 5) The P Scale or Psi Scale is a method of measuring telepathic power used in the fictional Babylon 5 universe by the Psi Corps, which controls and utilizes human telepaths (or teeps), and subsequently throughout the Earth Alliance. The scale covers the full range of naturally occuring capabilities and ranges from P0 to P12.
P with stroke (minuscule: ) or "p with stroke" is a letter of the Latin alphabet, formed from P with the addition of a stroke, usually through the bowl but sometimes through the descender. It is used in some phonetic transcription systems, such as the Americanist phonetic notation, to represent a voiceless bilabial fricative (IPA: ).
P with tilde P with tilde (majuscule: , minuscule: ) is a letter of the Latin alphabet, derived from P with the addition of a tilde. It is or was used in some languages of Vanuatu, such as North Efate, South Efate and Namakura, to represent a voiceless labial-velar stop (IPA: ).
P'ent'ay P'ent'ay or Pentay(Amharic- ፔንጤ) is a slang term widely used in modern Ethiopia, and among Ethiopians living abroad, to describe Ethiopian Christians who are not members of the Ethiopian Orthodox Tewahedo, Ethiopian Orthodox Tehadeso, Roman Catholic or Ethiopian Catholic churches. The term is an abbreviation of the word "Pentecostal" however it is widely used while referring to all Ethiopian Protestant Christians.
P'Gell P'Gell is a fictional character from the comics series The Spirit, first appeared in 1948, created by Will Eisner. She's clearly a femme fatale, in fact one of the first one in comics, seductive and alluring, always trying to sway the eponymous character, Danny Colt, The Spirit, to a life of crimes at her side.
P'tit quinquin "P'tit quinquin" is a song by Alexandre Desrousseaux which was written in 1853 in Picard. The Picard language is closely related to French, and is spoken in two regions in the north of France – Nord-Pas-de-Calais and Picardie – and in the Belgian region Wallonia.
P'tite fleur aimée P'tite fleur aimée (also known as P'tite fleur fanée), is the best known song from the island of Réunion. While "La Marseillaise" is the official national anthem, "P'tite fleur aimée" is considered an unofficial local anthem.
P'u In Taoism P'u, meaning simplicity, is a central theme of the teachings of Lao Tzu. Its ideogram consists of the characters for tree and dense growth, thus a tree in a thicket, thus things in their natural state.
P'urhépecha The P'urhépecha, sometimes referred to as Tarascan or Purépecha are an indigenous people centered in the northwestern region of the Mexican state Michoacán, principally in the area of the cities of Uruapan and Patzcuaro. P'urhépecha, previously referred to as "Tarascan", is also often used as a name for the P'urhépecha language which is still spoken by more than 100,000 people in Michoacán.
P'urhépecha language P'urhépecha (also Tarascan, Tarasco, Phorhé, Purepecha) is a language isolate spoken by more than 100,000 P'urhépecha people in the highlands of the Mexican state of Michoacán. Even though it is spoken within the boundaries of Mesoamerica P'urhépecha does not share many of the traits defining the Mesoamerican Linguistic Area, probably due to a long adherance to an isolationist policy.
P'yatyhatky, Vynohrad P'yatyhatky is a part of the Vynohrad village (so-called kutok) with the coach station at one corner and between the road towards Tynivka (photo on the left) and the road towards Ripky (photo on the right). This kutok was called P'yatyhatky back in 1950s, it is not clear whether it is known by some distinct name now - but in any case, it is one of the most beautiful and remarkable parts of Vynohrad.
P-1500(Ultra-Heavy Tank) In December of 1942, Krupp created new design of 1500 ton tank - P 1500. It frontal armor would be 250mm thick and it would be armed with 800mm super heavy mortar "Dora" type and possibly two 150mm artillery pieces.
P-2 Neptune The Lockheed P-2 Neptune (until 1963 the P2V Neptune) was a naval patrol bomber and anti-submarine warfare (ASW) aircraft for the United States Navy between 1947 and 1978, replacing the PV-1 Ventura and PV-2 Harpoon and being replaced in turn with the P-3 Orion. Designed as a land-based aircraft, the Neptune never made a carrier landing, although a small number of aircraft were converted for carrier use and successfully launched.
P-26 Peashooter The Boeing P-26, nicknamed the "Peashooter", was the first all-metal production fighter aircraft and the first pursuit monoplane used by the United States Army Air Corps. The prototype first flew in 1932, and were used as late as 1941 in the Philippines.
P-38 Lightning The Lockheed P-38 Lightning was a World War II American fighter aircraft. Developed to a United States Army Air Corps requirement, the aircraft had twin booms with the engines mounted forward and a single, central nacelle containing the pilot and armament.
P-43 Lancer The Republic P-43 Lancer was a single-engine, all-metal, low-wing monoplane fighter aircraft first delivered in 1940 to the United States Army Air Corps. This article also covers a proposed P-43 development, the P-44 Rocket.
P-47 Thunderbolt The American Republic P-47 Thunderbolt, also known as the "Jug," was the largest single-engined fighter of its day. It was one of the main United States Army Air Force (USAAF) fighters of the Second World War.
P-5 Pyatyorka The P-5 Pyatyorka (; "Pyatyorka" means "fiver" in English - the equivalent to an A grade) was a cold war era anti-shipping missile of the Soviet Union, designed by the Chelomei design bureau. Its GRAU designation is 4K34.
P-51 Mustang The North American P-51 Mustang was an American long-range single-seat fighter aircraft that entered service with Allied air forces in the middle years of World War II. The P-51 became one of the conflict's most successful and recognizable aircraft.
P-61 Black Widow The Northrop P-61 Black Widow was an all-metal, twin-engine, twin-boom, monoplane night fighter and night intruder aircraft flown by the United States Army Air Forces during World War II. It was the first American – and only Allied – purpose-built aircraft to serve as a radar-equipped night fighter.
P-63 Kingcobra The Bell P-63 Kingcobra was an American fighter developed in World War II from the P-39 Airacobra in an attempt to correct that aircraft's deficiencies. Although the aircraft was not accepted for combat use by the USAAF, it was successfully adopted by the VVS in the Soviet Union.
P-75 Eagle The General Motors P-75A Eagle was a fighter aircraft for which the General Motors Corporation in September 1942 submitted a proposal to meet a United States Army Air Forces requirement for a fighter possessing an extremely high rate of climb. The proposal was for an aircraft that used the most powerful liquid-cooled engine then available, the Allison V-3420, and components from existing aircraft.
P-8 Poseidon The P-8A Poseidon (formerly the Multimission Maritime Aircraft or MMA) is intended to search for and destroy submarines, conduct shipping interdiction, and also possibly engage in an electronic intelligence (ELINT) role. This will involve carrying torpedoes, depth charges, Harpoon anti-shipping missiles, and other weapons.
P-800 Oniks The P-800 Oniks (, alternatively termed Yakhont (Яхонт) for export markets; "Oniks" is onyx, and "Yakhont" is ruby or sapphire in English) is a Russian (former Soviet) supersonic anti-ship cruise missile developed by NPO Mashinostroyeniya as a ramjet version of P-80 Zubr. Its GRAU designation is 3M55.
P-adic division algorithm The p-adic division algorithm is a simple algorithm for dividing p-adic numbers in mathematics. Most algorithms proceed one p-adic digit at a time, but this algorithm improves the number of correct digits in the quotient by a factor of c during each calculation.
P-adic number The p-adic number systems were first described by Kurt Hensel in 1897. For each prime number p, the p-adic number system extends the ordinary arithmetic of the rational numbers in a way different from the extension of the rational number system to the real and complex number systems.
P-block The p-block of the periodic table of the elements consists of the last six groups minus helium (which is located in the s-block). In the elemental form of the p-block elements, the highest energy electron occupies a p-orbital.
P-compact group A p-compact group is a mathematical object, studied in the part of mathematics called algebraic topology. A p-compact group is a homotopical version of a compact Lie group, but with all the structure concentrated at a single prime p.
P-complete In complexity theory, the complexity class P-complete is a set of decision problems and is useful in the analysis of which problems can be efficiently solved on parallel computers. A decision problem is in P-complete if it is complete for P, meaning that it is in P, and that every problem in P can be reduced to it in polylogarithmic time on a parallel computer with a polynomial number of processors.
P-Code machine In computer programming, a P-code machine or pseudo-code machine is a specification of a cpu whose instructions are expected to be executed in software rather than in hardware (ie, interpreted). This term is applied both generically to all such specifications, although many specifications create their own name (eg, Java uses byte-code) and to particular specifications (the most famous being UCSD Pascal P-code).
P-Funk P-Funk is a musical genre associated with George Clinton and other members of Parliament Funkadelic, which had a heyday in the 1970s, and still continues to attract new fans thanks both to the legacy of stank samples it bequeathed to hip hop, and the live shows that the band still continues to perform.
P-glycoprotein P-glycoprotein (abbreviated as P-gp or Pgp, also called ABCB1, ATP-binding cassette sub-family B member 1, MDR1, P-glycoprotein, and PGY1) is a well characterized human ABC-transporter of the MDR/TAP subfamily. It is extensively distributed and expressed in normal cells such as those lining the intestine, liver cells, renal proximal tubular cells, and capillary endothelial cells comprising the blood brain barrier.
P-group In mathematics, given a prime number p, a p-group is a periodic group in which each element has a power of p as its order. That is, for each element g of the group, there exists a nonnegative integer n such that g to the power pn is equal to the identity element.
P-Grid P-Grid is a self-organizing structured peer-to-peer system, which can accommodate arbitrary key distributions (and hence support lexicographic key ordering and range queries), still providing storage load-balancing and efficient search by using randomized routing.
P-chart The P chart is very similar to the X-bar chart except that the statistic being plotted is the sample proportion rather than the sample mean. Since the proportion deals with the percentage of successes, clearly the appropriate data for P charts needs to be attribute data where the outcomes for each trial can be classified as either a success or a failure (conform or non-conform, yes or no, etc.
P-loop A P-loop or phosphate-binding loop, is an ATP/GTP binding site motif found in many nucleotide-binding proteins. It is a flexible loop between the first β-strand and the first α-helix of the protein and can interact with one of the phosphate groups of the nucleotide.
P-matrix In mathematics, a P-matrix is a complex square matrix with every principal minor > 0. A closely related class is that of P_0-matrices, which are the closure of the class of P-matrices, with every principal minor geq 0.
P-Nut Aaron Charles Wills (stage name: P-Nut), (born June 5, 1974 in Indianapolis, Indiana) is an American musician, and bassist for band 311. Aaron was given the nickname "P-Nut" by his friends who thought Aaron's head was shaped like a peanut.
P-Patch A P-Patch is a parcel of property used for gardening allotments; the term is specific to Seattle, Washington. The "P" originally stood for "Picardo", after the family who owned Picardo Farm in Seattle's Wedgwood neighborhood, part of which became the original P-Patch.
P-Phenylenediamine p-Phenylenediamine (PPD), also called 1,4-diaminobenzene or 1,4-phenylenediamine is an aromatic amine used as a component of engineering polymers and composites, aramid fibers, hair dyes, rubber chemicals, textile dyes and pigments. PPD is selected because of its low toxicity, high temperature stability, high strength, and chemical and electrical resistance.
P-rep P-rep or p_{rep} is a statistical alternative to the classic p-value. Whereas a p-value indicates the probability of obtaining a result by chance alone, p-rep estimates the probability of replicating an effect.
P-selectin P-selectin is a cell adhesion molecule (CAM) found in granules in endothelial cells (cells lining blood vessels) and activated platelets. Other names for P-selectin include CD62P, Granule Membrane Protein 140 (GMP-140), and Platelet Activation-Dependent Granule to External Membrane Protein (PADGEM).
P-selectin glycoprotein ligand-1 P-selectin glycoprotein ligand-1 is a glycoprotein found on white blood cells and endothelial cells that binds to P-selectin (P stands for platelet). It is one of a family of selectins that includes E-selectin (endothelial) and L-selectin (leukocyte), and selectins are part of the broader family of cell adhesion molecules.
P-type asteroid P-type asteroids have low albedo and a featureless reddish electromagnetic spectrum. It has been suggested that they have a composition of organic rich silicates, carbon and anhydrous silicates, possibly with water ice in their interior.
P-type semiconductor A P-type semiconductor is obtained by carrying out a process of doping, that is adding a certain type of atoms to the semiconductor in order to increase the number of free (in this case positive) charge carriers.
P-value In statistical hypothesis testing, the p-value is the probability of obtaining a result at least as extreme as that obtained, assuming the truth of the null hypothesis that the finding was the result of chance alone. The fact that p-values are based on this assumption is crucial to their correct interpretation.
P-wave Of the two types of elastic body waves (named because they travel through the body of the Earth) that are produced by earthquakes and recorded by seismometers. The name primary comes from the fact that they have the highest velocity of all seismic waves and are thus the first to arrive at any seismic station, the other body wave type being S- or secondary waves.
P&I insurance Protection and indemnity insurance, commonly known as P&I, is marine insurance against third party liabilities and expenses arising from owning ships or operating ships as principals. It is distinct from other forms of marine insurance purchased by shipowners such as hull insurance and war risk insurance.
P&O Ferries P&O Ferries (formerly P&O European Ferries) is a constituent company of DP World (which took over its parent company, the Peninsular and Oriental Steam Navigation Company (P&O) in March 2006). P&O Ferries is registered in Dover, Kent.
P&O Irish Sea P&O Irish Sea (registered as P&O European Ferries (Irish Sea) Ltdis a constituent company of the Peninsular and Oriental Steam Navigation Company] (P&O). This sector of P&O is registered as based in [[Dover, Kent.
P. Aelius Aristides P. Aelius Aristides, surnamed Theodorus, one of the most cele­brated Greek rhetoricians of the second century, was the son of Eudaemon, a priest of Zeus, and born at Adriani in Mysia, according to some in 129, and according to others in 117.
P. C. Kryssing Christian Peter Kryssing (Born 1897 in Kolding, died 1976 in Haderslev) was a Danish officer, the first commander of the Freikorps Danmark. Kryssing led the corps from its inception until being replaced on 8 February 1942.
P. C. Wren Percival Christopher Wren (1875–1941) was a British writer, mostly of adventure fiction. He is remembered best for Beau Geste, a much-filmed book of 1924 involving the French Foreign Legion in North Africa, and its sequels, Beau Sabreur and Beau Ideal.
P. E. Society's Modern College of Pharmacy The Modern College of Pharmacy is a part of one of the most prestigious educational institution of Pune - The Progressive Education Society (PES). The history of PES goes long back into the pre independence era, when education had overtones of Patriotism and Social Obligation.
P. F. Strawson Sir Peter Frederick Strawson (November 23 1919 – 13 February 2006) was an English philosopher. He was the Waynflete Professor of Metaphysical Philosophy at the University of Oxford (Magdalen College) from 1968 to 1987.
P. G. T. Beauregard Pierre Gustave Toutant de Beauregard (pronounced IPA: ) (May 28, 1818 – February 20, 1893), best known as a general for the Confederate Army during the American Civil War, was also a writer, civil servant, and inventor. He was the first prominent Confederate general, commanding the defenses of Charleston, South Carolina, for the Battle of Fort Sumter, and was the victor at the First Battle of Bull Run.
P. G. Wodehouse Sir Pelham Grenville Wodehouse KBE (October 15, 1881 – February 14, 1975) () was an English comic writer who enjoyed enormous popular success for more than seventy years. Wodehouse was an acknowledged master of English prose admired both by contemporaries like Hilaire Belloc, Evelyn Waugh and Rudyard Kipling and by modern writers like Douglas Adams, Salman Rushdie, Terry Pratchett, and Stephen Fry.
P. H. Newby Percy Howard Newby (June 25, 1918 - September 6, 1997) was an English novelist and broadcasting administrator. He was the first winner of the prestigious Booker Prize, his novel Something to Answer For having captured the inaugural award in 1969.
P. J. Mir PJ MIR is a cricketer turned broadcaster who hosts Q & A With PJ Mir a popular and controversial news shows on Ary One World He is one of the pioneers of Live TV in Pakistan and is remains a widely watched show.
P. K . Sethi Pramod Karan Sethi (born 1927 in Varanasi, India) is a noted Indian orthopaedic surgeon and Padma Shri awardee. He helped develop the so called "Jaipur Foot", an artificial limb, and was given the Magsaysay Award for Community Leadership in 1981.
P. K. van der Byl Pieter Kenyon Fleming-Voltelyn van der Byl (November 11, 1923 – November 15, 1999) was a Rhodesian politician who was a close associate of Prime Minister Ian Smith and served as his Foreign Minister from 1974 to 1979. Coming from a wealthy Cape family in South Africa, van der Byl spoke with an accent typical of the upper-class English which many listeners believed he was affectingSee, e.
P. Kumaraswamy Ponnambalam Kumaraswamy (often referred to as Poondi Kumaraswamy) was a leading hydrologist from India. He was elected a Fellow of the Indian Academy of Sciences in 1974 although his only formal education was a Civil Engineering degree from Madras University.
P. L. Deshpande Purushottam Laxman Deshpande (Marathi: पुरुषोत्तम लक्ष्मण देशपांडे) (November 8, 1919 - June 12, 2000) was a noted Marathi writer from India. He was also famous as an orator and performing artist.
P. L. Robertson Peter Lymburner Robertson (1879-1951) is a Canadian inventor of the square-drive screw, first produced in his Milton, Ontario factory in 1908. Peter also wrote The Gold Standard, a book advocating gold-backed money.
P. Mohan Ponnuswamy Mohan (born 30 December, 1949) is a member of the 14th Lok Sabha of India. He represents the Madurai constituency of Tamil Nadu and is a member of the Communist Party of India (Marxist) (CPI(M)) political party.
P. N. Elrod Patricia Nead Elrod is an American fantasy writer specializing in novels about vampires. Her work falls into areas of fantasy and (in some cases) mystery or historical fiction, but normally not horror, since her vampires are the heroes.
P. N. Haksar Purshottam Narayan Haksar (1913-1998) was one of the earliest and most important political strategists in the political democracy of independent India. His most important role was in the political ascent of Indira Gandhi, as the Prime Minister in her own right and personal political strength, and the evolution of Indira as an Indian icon and leader.
P. Ole Fanger Povl Ole Fanger (July 16, 1934 – September 20, 2006) was an expert in the field of the health effects of indoor environments. He was a University Professor at Syracuse University when he died at the age of 72 from an abdominal aortic aneurism.
P. Roy Vagelos Pindaros Roy Vagelos (born 1929 in Westfield, New Jersey) was president and chief executive officer (1985) and chairman (1986) of Merck, he was widely admired for attracting top research scientists who developed many major new drugs. His experience gave him an unusual perspective on mastering three leading professions: medicine, science, business and went and become the Chief executive officer of the multinational pharmaceutical giant, Merck
P. Sainath Palagummi Sainath (1954-) is an award winning Indian development journalist and photojournalist focusing on social problems, rural affairs, poverty and the aftermaths of Globalization in India.Nobel Laureate Amartya Sen described him as "one of the world's greatest experts on famine and hunger".
P. T. Barnum Phineas Taylor Barnum (July 5, 1810 – April 7, 1891), American showman who is best remembered for his entertaining hoaxes and for founding the circus that eventually became Ringling Brothers and Barnum and Bailey Circus.
P. Y. Saeki (Paul) Yoshiro Saeki, (1871-1965), Japanese scholar of religion and law, was consulted on the rebuilding of Hiroshima after the atomic bomb blast of August 6 1945. He advised rebuilding the city as a relatively small and well-planned space.
P.C. Doherty Paul C. Doherty (born 1946, Middlesbrough) is an English writer, with a doctorate in history from the University of Oxford, who writes historical mysteries and novels under the pennames Anna Apostolou, Michael Clynes, Ann Dukthas, C.
P.O.K. In 1927 Olympiacos, Panathinaikos and AEK Athens FC did not participate in the Greek Championship after disagreements with the Hellenic Football Federation. The main reason had to do with the Championship's financial status.
P/B ratio The Price-to-book ratio, or P/B ratio, is a financial ratio used to compare a company's book value to its current market price. Book value is an accounting term denoting the portion of the company held by the shareholders; in other words, the company's total assets less its total liabilities.
P/E ratio The P/E ratio of a stock (also called its "earnings multiple", or simply "multiple", "P/E", or "PE") is used to measure how cheap or expensive its share price is. The lower the P/E, the less you have to pay for the stock, relative to what you can expect to earn from it.
P/poly In computational complexity theory, P/poly is the complexity class of languages recognized by a polynomial-time Turing machine with a polynomial-bounded advice function. It is also (equivalently) defined as the class of languages that have a polynomial-size non-uniform circuit family.
P11 p11 is a protein found in the brain of humans and other mammals which has been implicated in the regulation of mood. A mouse study from 2006 found that low levels of p11 are likely to prevent the raising of serotonin levels from immediately curing clinical depression.
P110δ The phosphoinositide 3-kinase (PI3K) p110δ is an enzyme that regulates immune function. In contrast to the other class IA PI3Ks p110α and p110β, p110δ is principally expressed in leukocytes (white blood cells).
P11D Form P11D (Expenses and Benefits) is filed by UK employers for each director and employee earning over ÂŁ8500 per year, and sent to the tax office with which their PAYE scheme is registered. The employees are also given a copy, should they need it for a self-assessment tax return.
P2 (storage media) DVCPRO P2 (P2 is short form for "Professional Plug-In") is a professional digital video format introduced by Panasonic in 2004, and especially tailored to ENG applications. It features tapeless (non-linear) recording of DVCPRO or DVCPRO50 streams on a solid state flash memory card.
P2 Train Map P2 is named after the class of locomotive designed by Sir Nigel Gresley. It is a train mapping system used in Britain’s mainline railways to assist with the visualisation of train movement data for monitoring purposes.
P21 p21, also known as cyclin-dependent kinase inhibitor 1A or CDKN1A, is a human gene on chromosome 6 (location 6p21.2), that encodes a cyclin-dependent kinase inhibitor that directly inhibits the activity of cyclin-CDK2 and cyclin-CDK4 complexes.
P22 type foundry P22 type foundry is a digital type foundry from Buffalo, New York, that develops and markets typefaces for the Macintosh and Windows platforms. The name P22 has no specific significance and was used prior to the type foundry as a label for various art projects including an ambitious mail art correspondence.
P25 Project 25 (P25) is a suite of standards for digital radio communications for use by federal, state/province and local public safety agencies in North America to enable them to communicate with other agencies and mutual aid response teams in emergencies. In this regard P25 fills the same role as the European Tetra protocol (although it is not compatible with Tetra).
P2PTV The term P2PTV refers to peer-to-peer software applications designed to redistribute video streams on a p2p network, typically TV stations across the world. The draw to these applications is significant because they have the potential to make every TV channel in the world global.
P2X receptor P2X receptors are a family of cation-permeable ligand gated ion channels that open in response to extracellular adenosine 5'-triphosphate (ATP). They belong to a larger family of receptors known as the purinergic receptors.
P2Y receptor P2Y receptors are G protein-coupled receptors that are stimulated by nucleotides such as ATP (P2Y2, P2Y11), ADP, UTP (P2Y2, P2Y4), UDP (P2Y6) and UDP-glucose. To date, 8 P2Y receptors have been cloned in humans: P2Y1, P2Y2, P2Y4, P2Y6, P2Y11, P2Y12, P2Y13 and P2Y14.
P3 Mk2 mine The P2 Mk2 and P3 Mk2 are Pakistani plastic cased minimum metal anti-tank blast mines. The P2 Mk2 has a square case with a central circular ribbed pressure plate, the P3 is circular with a central circular pressure plate.

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