All articles starting with P
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Packet radio
Packet radio is digital data communication between amateur radio stations, which breaks messages into addressed frames sent over a shared radio channel, principally using the AX.25 protocol.
Packet switching
Packet switching, also called packet mode communication, is a method of transmitting data by splitting messages into packets that are routed independently and reassembled at the destination.
Packet Tracer
Cisco Packet Tracer is a cross-platform network simulation and visualization program developed by Cisco for its Networking Academy, letting students design, configure, and troubleshoot virtual networks without physical hardware.
Packet trade
The packet trade was the carriage of mail, passengers, and cargo by vessels on fixed schedules, beginning with the Black Ball Line between New York and Liverpool in 1818.
PacketFabric
PacketFabric is a Culver City, California Network-as-a-Service company, incorporated in Delaware in 2019, that sells on-demand private connectivity between colocation facilities and cloud providers; it merged with Unitas Global in 2023.
Packing fraction (mass spectrometry)
The packing fraction, introduced by Francis William Aston in the 1920s, measures how far an isotope's mass deviates from its whole-number mass number, reflecting nuclear binding energy.
Packing problems
A packing problem asks how to arrange objects in a region without overlap, optimizing density or number of items, from sphere packing to bin packing.
PackNet
PackNet is a continual learning method for deep neural networks, introduced by Mallya and Lazebnik at CVPR 2018, that adds tasks by pruning and freezing weights.
Packstation
Packstation is a network of automated self-service parcel lockers operated by DHL in Germany, launched in 2003 as the first automated parcel locker system worldwide, with over 12,500 machines.
Packstone
Packstone is a limestone in the Dunham classification of carbonate rocks, defined in 1962 as grain supported but containing carbonate mud between the sand-sized grains.
Packy Lee
Packy Lee (Packie Lee) is a Belfast-born actor best known as Johnny Dogs in Peaky Blinders (2013–2022, 23 episodes) and The Immortal Man; also The Shore, King of the Travellers, Blue Lights, and stage work at the Lyric Theatre.
Paclitaxel
Paclitaxel, sold as Taxol, is a chemotherapy drug isolated from Pacific yew bark that stops cancer cell division by stabilizing microtubules; the FDA approved it for ovarian cancer in 1992.
Paclitaxel chemotherapy
Paclitaxel chemotherapy is cancer treatment with paclitaxel, a taxane drug originally isolated from the Pacific yew tree, FDA-approved in 1992 and used mainly for ovarian, breast, and lung cancers.
Paclitaxel poliglumex
Paclitaxel poliglumex (PPX, CT-2103, Xyotax, Opaxio) is an investigational water-soluble conjugate of paclitaxel with poly-L-glutamic acid, inactive until cathepsin B releases the drug in tumors; phase III NSCLC trials showed no survival advantage and its EMA application was withdrawn in 2009.
Paclitaxel regimen
A paclitaxel regimen is a chemotherapy treatment plan built around paclitaxel, a microtubule-stabilizing taxane given alone or combined with agents such as carboplatin, gemcitabine, or trastuzumab to treat ovarian, breast, lung, and pancreatic cancers.
Paclitaxel total synthesis
Paclitaxel total synthesis: laboratory construction of the anticancer drug Taxol from simple starting materials. First achieved in 1994 by Holton and Nicolaou; over ten routes exist but none is commercially viable, so production uses semisynthesis.
Paclitaxel/topotecan regimen
The paclitaxel/topotecan regimen is an intravenous chemotherapy combination pairing the taxane paclitaxel with topotecan, developed for recurrent, persistent, and metastatic cervical cancer and studied in ovarian and breast tumors.
Paclobutrazol
Paclobutrazol (C15H20ClN3O) is a triazole plant growth regulator, discovered by ICI in 1980, that inhibits gibberellin biosynthesis; used on ornamentals, turf, and mango, with EU approval extended to 31 January 2029.
PACMAN-AMI trial
PACMAN-AMI (PCSK9 Antibody Alirocumab on Coronary Atherosclerosis in Acute Myocardial Infarction) trial: 2022 European randomized trial of 300 AMI patients showing alirocumab plus rosuvastatin regressed coronary plaque, reduced lipid core, and thickened fibrous caps.
Paco Alcácer
Paco Alcácer (Francisco Alcácer García, born 1993, Torrent, Valencia) is a Spanish retired striker for Valencia, Barcelona, Borussia Dortmund, Villarreal, and Sharjah; 19 Spain caps, 12 goals; retired March 2026.
Paco de Lucía
Paco de Lucía (Francisco Sánchez Gómez, 1947–2014) was a Spanish flamenco guitarist from Algeciras, innovator of flamenco guitar, collaborator of Camarón de la Isla and Al di Meola, and importer of the Peruvian cajón.
Paco Rabanne
Paco Rabanne (Francisco Rabaneda Cuervo, 1934–2023), Spanish-born Parisian couturier of the '12 Unwearable Dresses' (1966), built garments from metal, Rhodoïd and paper; the Puig-owned house, renamed Rabanne in 2023.
Paco Tous
Paco Tous (born 1964, Seville) is a Spanish actor, co-founder of theater company Los Ulen, known as Inspector Paco Miranda in Los hombres de Paco and Moscow in La casa de papel.
Pacôme Dadiet
Pacôme Dadiet (born 2005, Aubagne, France) is a French forward for the New York Knicks, drafted 25th overall in 2024 from Ratiopharm Ulm; he develops with the Westchester Knicks in the G League.
Pacorus I
Pacorus I (پاکور) was a Parthian prince and general, son of King Orodes II, who invaded Syria, installed Antigonus in Judea, and was killed in 38 BC.
Pacorus II of Parthia
Pacorus II (پاکور دوم) was a king of the Parthian Empire who reigned from about 78 to 105 amid rival claimants, and expanded Ctesiphon with city walls.
Pacritinib
Pacritinib (VONJO), a JAK2/FLT3/IRAK1 kinase inhibitor approved by FDA in 2022 for myelofibrosis with platelets below 50 × 10^9/L, dosed 200 mg twice daily, developed through PERSIST-1, PERSIST-2, and PAC203 trials.
PACS (wireless)
PACS, the Personal Access Communications System, was a low-power US wireless standard for PCS and wireless local loop telephony in the 1.9 GHz band, standardized as ANSI J-STD-014.
Pact Capital Partners
Pact Capital Partners is a New York GP stakes investment firm, founded in 2025 by former Goldman Sachs and McKinsey executives Christian von Schimmelmann and Brian Vickery.
Pact of Biak-na-Bato
The Pact of Biak-na-Bato (Pacto de Biak-na-Bató), signed 14 December 1897, was a truce between Governor-General Primo de Rivera and Emilio Aguinaldo, brokered by Pedro Paterno: Hong Kong exile, amnesty, and 800,000 Mexican pesos, later unfulfilled.