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Pepsi
Pepsi, first sold as Brad's Drink and renamed Pepsi-Cola in 1898, is a carbonated cola created in 1893 by pharmacist Caleb Bradham in New Bern, North Carolina.
Pepsi Twist
Pepsi Twist is a lemon-flavored variant of Pepsi introduced in the United States in 2001, launched in over 70 countries, and later discontinued in the US.
Pepsodent
Pepsodent is a toothpaste brand launched in the United States in 1915, famed for its pioneering advertising and its slogan "You'll wonder where the yellow went."
Peptoid nanosheet
A peptoid nanosheet is a free-floating, two-dimensional crystalline membrane self-assembled from synthetic peptoid polymers, discovered at Lawrence Berkeley National Laboratory in 2010 and studied for biosensing and drug delivery.
Per F. Peterson
Per F. Peterson is an American nuclear engineer at UC Berkeley and co-founder of Kairos Power, elected to the National Academy of Engineering in 2020.
Per Gunnar Engström
Per Gunnar Engström (1923–2015) was a Swedish electrical engineer at ASEA who led HVDC transmission development and was elected to the US National Academy of Engineering in 1992.
Per K. Enge
Per K. Enge (Per Kristian Enge, 1953–2018) was a Norwegian-born electrical engineer and Stanford professor who directed the Stanford GPS Lab and led the design of WAAS and maritime DGPS.
Per V. Bruel
Per V. Bruel, also known as Per Vilhelm Brüel, was a Danish acoustics engineer who co-founded the instrumentation company Brüel & Kjær in 1942 with Viggo Kjær.
Per Vilhelm Brüel
Per Vilhelm Brüel (1915–2015) was a Danish acoustics engineer who co-founded the instrumentation company Brüel & Kjær in 1942 and made sound and vibration measurement routine in industry.
Per-survivor processing
Per-survivor processing (PSP) is a digital communications technique in which each Viterbi survivor path carries its own channel estimate, jointly detecting data and estimating unknown parameters.
Per-tone equalization
Per-tone equalization is the one-tap frequency-domain equalization method in OFDM receivers, where each subcarrier is corrected by a single complex multiplication using an estimated channel gain.
Peratech QTC
Peratech QTC, or Quantum Tunnelling Composite, is a pressure-sensitive metal-polymer composite developed by UK company Peratech, used in force-sensing touch controls and robotic tactile sensors.
Perazzi (shotgun manufacturer)
Perazzi is an Italian manufacturer of high-end competition and game shotguns, founded by Daniele Perazzi in 1957 in Brescia, Italy, and known for the MX8 shotgun and its detachable trigger group.
PERC (solar cell)
PERC, or Passivated Emitter and Rear Cell, is a silicon solar cell architecture invented by Martin Green's team at UNSW in 1983, dominant from 2018 until TOPCon displaced it from 2025.
Perceiver
Perceiver is a neural network architecture from Google DeepMind, introduced in 2021, that processes inputs of any modality via cross-attention into a small latent array.
Percent-encoding
Percent-encoding, also called URL encoding, represents special or non-ASCII characters in a URL as a percent sign followed by two hexadecimal digits, such as %20 for a space.
Perceptive locomotion
Perceptive locomotion is a legged-robot control approach that fuses proprioception with external terrain sensing, such as elevation maps from lidar or depth cameras, letting the robot anticipate steps and obstacles.
Percepto
Percepto is an Israeli technology company, founded in 2014, that provides autonomous drone-in-a-box inspection and monitoring systems for energy, utility, oil and gas, and mining sites.
Perceptron
The perceptron is a linear binary classifier described by Frank Rosenblatt in 1957, which learns by adjusting its weights only when it misclassifies a training example.
Perceptual evaluation of speech quality
Perceptual evaluation of speech quality (PESQ) is an ITU-T standard, P.862, that predicts perceived speech quality by comparing a degraded signal against a clean reference.
Perceptual hashing
A perceptual hash is a short fingerprint of an image, video, or audio file that stays similar under resizing, compression, and noise, enabling near-duplicate detection and media retrieval.
Percipio XYZ
Percipio XYZ, also known as 图漾科技 or Shanghai Percipio Technology, is a Chinese company founded in Shanghai in 2015 that makes 3D depth cameras for industrial automation, logistics, and mobile robots.
Percussion cap
The percussion cap, or percussion primer, is a small metal cup holding a shock-sensitive explosive, invented in the early 1800s to replace the flintlock ignition system.
Percy Liang
Percy Shuo Liang is an American computer scientist and Stanford professor working on machine learning and natural language processing, known for the CRFM and the HELM benchmark.
Percy Pilcher's gliders
Percy Pilcher's gliders were four hang-gliders, the Bat, the Beetle, the Gull, and the Hawk, built and flown by British engineer Percy Pilcher between 1894 and 1897.
Percy William Pilcher
Percy William Pilcher, usually recorded as Percy Sinclair Pilcher, was a British engineer who flew hang gliders in the 1890s and set a world gliding distance record of 250 m.
Perdido (oil field)
Perdido is a deepwater oil and gas development in the Gulf of Mexico operated by Shell, which began production in 2010 through the world's deepest spar platform.
Perdido Development
The Perdido Development is a Shell-operated deepwater oil and gas complex in the US Gulf of Mexico using the world's deepest spar platform, with first production in 2010.
Pere Marquette 1225
Pere Marquette 1225 is a preserved 1941 Berkshire steam locomotive in Owosso, Michigan, known as the prototype for the train in the 2004 film The Polar Express.
Peregrine Mission One
Peregrine Mission One was the first Commercial Lunar Payload Services flight, an Astrobotic lunar lander that launched on Vulcan in January 2024 but leaked propellant and never landed.