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Punch list
A punch list is an itemized list of mostly minor fixes to complete before final payment on a construction project, also called a snag list.
Punch Powertrain
Punch Powertrain is an independent automotive powertrain supplier headquartered in Sint-Truiden, Belgium, producing CVTs, hybrid transmissions, and electric drivetrains for more than 30 car brands worldwide.
Punch test (materials testing)
The punch test, or punch testing, is a mechanical testing method in which a punch is pressed through a clamped specimen to measure shear strength or penetration resistance.
Punch-through
Punch-through is a failure mode of short-channel MOSFETs in which the source and drain depletion regions merge, creating a parasitic current path the gate cannot control, causing leakage and permanent damage.
Punchcutting
Punchcutting is the craft of cutting a character in mirror image on a steel punch, struck into copper to form a matrix from which metal type is cast.
Punched card
A punched card, or punch card, stores data as holes in stiff paper, dominant for data processing and computer input from the 1890s until the 1970s.
Punched tape
Punched tape, also called paper tape, is a paper strip storing data as patterns of punched holes, widely used for computers from the 1950s to the 1970s.
Puncturing (coding theory)
Puncturing is a channel coding technique that deletes selected coded bits before transmission to raise the code rate, letting one mother code serve several rates.
Pune Airport (पुणे आंतरराष्ट्रीय विमानतळ)
Pune Airport, also known as Pune International Airport and Lohegaon Airport, serves Pune, Maharashtra, India, sharing its runway with the Indian Air Force's Lohegaon Air Base.
Pune Metro (पुणे मेट्रो)
Pune Metro, also known as Pune Metro Rail (पुणे मेट्रो), is a rapid transit system serving Pune and Pimpri-Chinchwad in Maharashtra, India, opened in 2022 with two lines.
Punga-Ukhta-Gryazovets Gas Pipeline
The Punga-Ukhta-Gryazovets Gas Pipeline is a Gazprom-owned Russian natural gas trunkline running from Punga through Ukhta to Gryazovets, carrying West Siberian and Yamal gas into Russia's northern corridor since 1981.
Punjab Canal Colonies
The Punjab Canal Colonies were British state-run schemes that irrigated wasteland in western Punjab and allotted it to peasant colonists, with nine colonies built between 1885 and 1940.
Punjab State Power Corporation Limited
Punjab State Power Corporation Limited (PSPCL) is the state-owned utility that generates and distributes electricity in Punjab, India, formed in 2010 from the Punjab State Electricity Board.
Punji stick
The punji stick, or punji stake, is a sharpened, often poisoned bamboo or steel stake set in hidden traps, most associated with Viet Cong tactics in the Vietnam War.
Punt gun
A punt gun is an extremely large shotgun, about 10 feet long and 100 pounds, mounted on the bow of a boat to kill dozens of waterfowl per shot.
Punta Cana International Airport
Punta Cana International Airport, also known as Aeropuerto Internacional de Punta Cana, is a privately owned airport on the Dominican Republic's eastern coast, opened in 1983 as the world's first private commercial international airport.
Punta Europa LNG Terminal
Punta Europa LNG Terminal is an LNG export terminal on Bioko Island, Equatorial Guinea, operated as EG LNG, which shipped its first cargo in 2007.
Punto di Scambio Virtuale
Punto di Scambio Virtuale (PSV) is the virtual trading hub of the Italian natural gas market, established in 2003 and managed by Snam Rete Gas.
Puppet (software)
Puppet is an open-source IT automation and configuration management tool written in Ruby and first released in 2005, in which managed nodes pull a desired-state catalog from a central server.
Puppeteer (software)
Puppeteer is a JavaScript library maintained by Google's Chrome team that controls Chrome or Firefox headlessly, used for screenshots, PDFs, crawling, and automated UI testing since 2017.
Puqi Xianning power station
Puqi Xianning power station is a 4,660 MW coal-fired power station in Chibi, Hubei, China, owned by China Resources Power and built between 2004 and 2025.
Puquios
Puquios, from Quechua pukyu meaning spring, are subterranean filtration galleries in the Nasca valleys of southern Peru that tap the water table and still irrigate fields today.
Purana Qila
Purana Qila, the Old Fort, is a 16th-century citadel in New Delhi begun by Humayun as his capital Dinpanah in 1533 and rebuilt by Sher Shah Suri.
Pure Data
Pure Data (Pd) is a free, open-source visual programming environment for real-time music, audio, and multimedia, created by Miller Puckette around 1996 as an open-source rewrite of his earlier program Max.
Pure function
A pure function is a function that only performs a calculation, never changing existing state and always returning the same result, enabling testing, caching, and compiler optimization.
Pure pursuit
Pure pursuit is a geometric path-tracking algorithm that steers a vehicle toward a lookahead point on a reference path, widely used for lateral control in autonomous vehicles.
Pure Storage
Pure Storage, renamed Everpure, Inc. in 2026, was an American company in Santa Clara, California, that built all-flash enterprise storage systems like FlashArray and FlashBlade.
PUREX process
The PUREX process, developed in the early 1950s, is a solvent extraction method that recovers uranium and plutonium from spent nuclear fuel using tributyl phosphate.
Purified water
Purified water, also called DI water or pure water, is water from any source treated to remove chemicals, dissolved solids, and microbes to a defined standard.
Purlin
A purlin is a horizontal structural member in a roof, parallel to the ridge and eaves, that provides intermediate support to rafters or roof sheeting.