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Premature convergence
Premature convergence is a failure mode of evolutionary algorithms in which the population loses diversity and settles too early on a suboptimal solution, usually a local optimum.
Premetro
A premetro is an urban transit system where trams run in tunnels built to allow later conversion to a full metro, notably in Brussels and Antwerp.
Premier Inn
Premier Inn, formerly Travel Inn and Premier Travel Inn, is a British budget hotel chain owned by Whitbread and the largest hotel brand in the United Kingdom.
Premier Padmini
The Premier Padmini was a four-door saloon made in Mumbai by Premier Automobiles from 1964 to 2000, beginning as a licensed Fiat 1100 D and famous as Mumbai's black-and-yellow taxi.
Premier Transmission
Premier Transmission Limited is a Northern Ireland gas transmission company that owns the Scotland to Northern Ireland Pipeline, a 135-kilometer link from Twynholm, Scotland, to Ballylumford.
Premium Aerotec
Premium Aerotec was a German aerostructures manufacturer and Airbus subsidiary that produced fuselage sections for the A320, A350, and A400M before its 2025 absorption into Airbus.
Premium Platform Electric
Premium Platform Electric (PPE) is an 800-volt vehicle platform for fully electric premium cars developed jointly by Audi and Porsche, underpinning the Macan Electric and Q6 e-tron.
Premium-rate telephone number
A premium-rate telephone number is a number charged at a rate above an ordinary call, with part of the charge paying for services like TV voting and information lines.
Premixed combustion
Premixed combustion is combustion in which the fuel and oxidizer are mixed before burning, so a flame propagates through a homogeneous mixture, as in a Bunsen burner.
Prepar3D
Prepar3D is a visual simulation platform developed by Lockheed Martin, which bought Microsoft's ESP technology in 2009 and launched it in 2010 for training across aviation, maritime, and ground domains, from underwater to sub-orbital space.
Prepared statement
A prepared statement, also known as a parameterized query or bind variable, is a database feature in which SQL is pre-parsed and parameter values are supplied separately, preventing SQL injection.
Preply, Inc.
Preply is an online language-learning marketplace connecting learners with independent tutors for live one-on-one video lessons, founded in 2012 and valued at $1.2 billion in 2026.
Prescott (microprocessor)
Prescott was the code name for Intel's 90 nm Pentium 4 processor, launched in 2004 with a 31-stage pipeline, 1 MB L2 cache, and SSE3 instructions.
Prescribed performance control
Prescribed performance control (PPC) is a control design methodology, proposed by Bechlioulis and Rovithakis in 2008, that fixes overshoot, convergence rate, and steady-state error in advance.
Presearch (search engine)
Presearch was a decentralized search engine founded in 2017 by Colin Pape in which users earned PRE tokens for searching; it shut down in July 2026.
Presence information
Presence information is data describing a user's current availability and status on a network, such as online, offline, busy, or away, so others can see it before communicating.
PresenceLearning Holdings, Inc.
PresenceLearning Holdings, Inc., doing business as Presence, is a New York City education technology company founded in 2009 that connects K-12 schools with licensed clinicians delivering remote special education services.
Present serviceability index
The present serviceability index (PSI) is a pavement quality measure on a scale of 0 to 5, developed at the AASHO Road Test in 1958 to 1960.
Presentation attack detection
Presentation attack detection, also called liveness detection, is a biometric security method that distinguishes a live person from spoofing artifacts like printed photos or masks.
Presentation layer
The presentation layer, also known as OSI layer 6 or the syntax layer, is the OSI model layer that gives applications a common data format, handling translation, encryption, and compression.
Presentation program
A presentation program is software for creating and delivering visual slides combining text, images, charts, and video, dominated by Microsoft PowerPoint, released in 1987 and acquired by Microsoft that year.
Preservation and digitization of 78 rpm records
Preservation and digitization of 78 rpm records covers the care, storage, playback, and digital transfer of brittle shellac discs that dominated recorded sound from 1898 to the late 1950s.
Preservation and restoration of railway vehicles
Preservation and restoration of railway vehicles is the practice of keeping historic trains and carriages, balancing operational use against static display under the Riga Charter.
Preservation of private railroad cars
Preservation of private railroad cars is the practice of saving, restoring, and operating privately owned passenger railcars called "private varnish", many restored vintage Pullman cars attached to Amtrak trains.
Preservative
A preservative is a substance added to food, cosmetics, and other products to prevent deterioration by inhibiting microbes, regulated under laws such as the EU cosmetics Annex V list.
Preserved British Rail diesel locomotives
Preserved British Rail diesel locomotives are more than 250 former BR main-line diesels kept on heritage railways, in museums, and on the national network by preservation groups.
Preserved manual switchboards and exchange museums
Preserved manual switchboards and exchange museums are surviving cord boards and exchange buildings that keep manual telephony, in which operators connected calls by plugging cords, as working artifacts.
Preserved railway carriages and heritage rolling stock
Preserved railway carriages and heritage rolling stock are historic coaches, brake vehicles, and wagons restored and operated on heritage railways and in museums, cataloged by the RCTS.
Preset (company)
Preset, Inc. is a San Mateo, California company founded in 2019 by Apache Superset creator Maxime Beauchemin that offers managed commercial hosting of the Apache Superset BI platform.
Presidente Juárez power station
The Presidente Juárez power station, also known as the Rosarito complex, is a gas-fired power station at Playas de Rosarito, Baja California, owned by CFE.