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Pedestrian and cycle tunnels by region
Pedestrian and cycle tunnels by region surveys where tunnels for walkers and cyclists cluster, covering the 1950s-to-1970s subway boom, river crossings like Rotterdam's Maastunnel, and modern Nordic cycle tunnels.
Pedestrian bridges in the United States by state
Pedestrian bridges in the United States by state surveys how footbridges are defined, registered, counted, and funded across the states, drawing on the National Bridge Inventory, the National Register of Historic Places, and state inventories.
Pedestrian crossing
A pedestrian crossing, or crosswalk, is a designated point on a roadway where people on foot are entitled to cross, ranging from painted stripes to signal-controlled facilities.
Pedestrian dead reckoning
Pedestrian dead reckoning (PDR) is a navigation technique that estimates a walking person's position step by step from inertial sensors, mainly indoors where satellite positioning is unavailable.
Pedestrian hybrid beacon
The pedestrian hybrid beacon (PHB), first developed as the HAWK in Tucson, Arizona, in the late 1990s, is a traffic device that lets pedestrians cross busy roads safely.
Pedestrian refuge island
A pedestrian refuge island is a raised median in the center of a road where pedestrians can stand while crossing one direction of traffic at a time.
Pediment
A pediment, or architectural pediment, is the triangular gable crowning a classical building or framing a door, window, or niche, originating in Greek temples and often filled with sculpture.
Pedometer
A pedometer, or step counter, is a portable device that counts a walking person's steps and converts the count into distance, now built into smartphones and wrist-worn fitness trackers.
PEDOT:PSS organic thermoelectrics
PEDOT:PSS organic thermoelectrics concern PEDOT:PSS, a water-processable conducting polymer blend and benchmark p-type organic thermoelectric with reported zT around 0.42, used in flexible, printed, and wearable generators.
Pedro Álvares Cabral
Pedro Álvares Cabral (c. 1467–c. 1520) was a Portuguese nobleman and naval commander who commanded the second expedition to India and made the official Portuguese discovery of Brazil in 1500.
Pedro Jose Alvarez
Pedro Jose Alvarez, also known as Pedro J.J. Alvarez, is a Nicaraguan-born environmental engineer at Rice University elected to the National Academy of Engineering in 2018.
Peec AI
Peec AI is a Berlin startup, founded in January 2025 by Marius Meiners, Daniel Drabo, and Tobias Siwonia, selling AI search analytics and generative engine optimization for brands.
PEEK
PEEK (polyether ether ketone) is a semi-crystalline, high-performance thermoplastic of the PAEK family with a 343 °C melting point, used in surgical implants such as spinal cages, in bearings, and in demanding industrial parts.
Peel P50
The Peel P50 is a single-seat, three-wheeled microcar built by Peel Engineering on the Isle of Man between 1962 and 1965, listed by Guinness as the smallest production car ever made.
Peenemünde Army Research Center
The Peenemünde Army Research Center (German: Heeresversuchsanstalt Peenemünde) was a secret German Army rocket facility on Usedom island, active from 1937 to 1945, birthplace of the V-2.
Peening
Peening is a surface treatment that plastically deforms metal by repeated impact from shot, laser shock, or ultrasound, leaving compressive stress that raises fatigue strength and crack resistance.
PEER Consultants
PEER Consultants, P.C. is an environmental engineering consulting firm founded in 1978 by Dr. Lilia A. Abron, a chemical and environmental engineer who leads it as president and CEO.
Peer Fischer
Peer Fischer is a German-based physicist and professor at Heidelberg University who heads a Max Planck lab in Heidelberg, known for micro- and nanorobotics and the first acoustic hologram.
Peer-to-peer
Peer-to-peer (P2P), also called a P2P network, is a network architecture in which computers, or peers, share resources and each acts as both service requester and provider, as in BitTorrent.
Peer-to-peer file sharing
Peer-to-peer (P2P) file sharing transfers files directly between computers, each acting as both client and server. It began with Napster in 1999 and survives chiefly in BitTorrent.
PeerTube
PeerTube is a free, open-source, decentralized and federated video platform developed by the French non-profit Framasoft as an alternative to centralized services like YouTube and Vimeo.
PEFT
PEFT (parameter-efficient fine-tuning) adapts large pretrained models to new tasks by training only a small fraction of added or reparametrized parameters, achieving performance comparable to full fine-tuning.
Pegadapalli (Jaipur Mandal) power station
Pegadapalli power station, also called the Singareni Thermal Power Plant (STPP), is a coal-fired power station in Mancherial district, Telangana, India, owned by Singareni Collieries.
Pegaga Oil and Gas Field
Pegaga is a natural gas field in Block SK320, offshore Sarawak, Malaysia, about 250 km northwest of Bintulu, discovered in 2013 and producing since March 2022.
Pegasus (British rocket)
Pegasus is a British solid-fuel sounding rocket of the inexpensive Skua, Petrel, and Fulmar family built by Bristol Aerojet for Britain's national upper-atmosphere research program.
Pegasus (spyware)
Pegasus is NSO Group's government-exclusive mobile spyware for iOS and Android (Android variant Chrysaor), infecting via 1-click links, network injection, and zero-click exploits like FORCEDENTRY; 45 countries, 50,000+ leaked target numbers, US Entity List 2021.
Pegasus Airlines
Pegasus Airlines, or Pegasus Hava Yolları, is a Turkish low-cost airline centered on Istanbul Sabiha Gökçen Airport; founded in 1990, it carried 43 million passengers in 2025.
Pegasus Bridge
Pegasus Bridge is the Caen Canal bridge at Bénouville, Normandy, captured intact by Major John Howard's glider-borne British force in the opening minutes of D-Day, 6 June 1944.
Pegasystems
Pegasystems Inc. is an American enterprise software company founded by Alan Trefler in 1983 and headquartered in Waltham, Massachusetts, selling AI-powered decisioning and workflow automation.
Pegatron (和硕联合科技)
Pegatron Corporation (和硕联合科技) is a Taiwanese electronics manufacturer headquartered in Taipei's Beitou District. Created in 2007 to hold ASUS's contract-manufacturing business, it was separated from ASUS in a 2010 spin-off.