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Progressive collapse
Progressive collapse is a structural failure mode in which an initial local failure, like loss of a column, spreads element to element, collapsing a building or disproportionately large part of it.
Progressive collapse analysis
Progressive collapse analysis is a structural engineering method that checks whether a building can absorb local damage, such as losing a column, without disproportionate collapse.
Progressive design–build
Progressive design–build (PDB) is a project delivery method in which an owner selects a design-builder on qualifications, then collaborates on scope and budget before the price is fixed.
Progressive distillation
Progressive distillation is a diffusion model training method that repeatedly halves sampling steps. Introduced in 2022, it reduces steps from 8192 down to 4 while maintaining near-optimal quality.
Progressive failure
Progressive failure is a failure process in soil, rock, or structures in which local strength loss spreads step by step as overstressed zones transfer load to neighbors.
Progressive failure analysis
Progressive failure analysis is a computational method in structural engineering that models damage initiation and growth in composite laminates under increasing load, used to predict ultimate strength and support certification of composite aircraft structures.
Progressive lens
A progressive lens, also called a progressive addition lens (PAL), is a spectacle lens whose power changes smoothly from distance vision at the top to near correction below.
Progressive neural networks
Progressive neural networks, or progressive networks, are a continual learning architecture introduced by Rusu and colleagues at Google DeepMind in 2016 that adds a frozen column per task.
Progressive rendering
Progressive rendering is the web development practice of displaying a page's content in pieces as it arrives from the server, first shipped in Netscape Navigator in 1994.
Progressive web app
A progressive web app (PWA), also called a progressive web application, is a website installable on a device, with app-like qualities such as offline operation and push notifications.
Prohibited airspace
Prohibited airspace is a volume of airspace within which civil flight is forbidden outright, typically protecting sensitive sites such as the White House or Camp David.
Prohod
Prohod-1 (Проход-1, Passage) is a Russian heavy robotic demining complex developed by VNII Signal on the BMR-3MA vehicle, which shares its chassis with the T-90 tank.
Project 17B-class frigate
Project 17B, also known as Project 17 Bravo, is an Indian Navy program for seven next-generation stealth frigates, Nilgiri-class follow-ons tendered by open bidding in 2026 for service in the 2030s.
Project 18-class destroyer
Project 18, also called the Next Generation Destroyer, is a planned class of stealth guided-missile destroyers for the Indian Navy, still in the design phase as of 2025.
Project 22160 patrol ship
The Project 22160 patrol ship is a class of modular offshore patrol vessels built for the Russian Navy, with six ships ordered for the Black Sea Fleet.
Project 25
Project 25 (P25), also called APCO Project 25, is a suite of standards for digital public safety radio, begun in 1989 to let radios from different manufacturers interoperate.
Project 76 submarine
Project 76, or P-76, is an Indian Navy program for indigenous diesel-electric attack submarines of about 3,000 tonnes, the first class India would design and build itself.
Project Ara
Project Ara was a Google effort, begun at Motorola, to build a modular smartphone with swappable components; it was suspended in 2016 without a consumer product.
Project Babylon
Project Babylon, also known as the Project Babylon Supergun, was an Iraqi weapons program of 1988 to 1990 to build very large guns, coordinated by artillery designer Gerald Bull.
Project Blue Book (TV series)
Project Blue Book is an American historical drama television series on History, created by David O'Leary and executive produced by Robert Zemeckis, dramatizing the Air Force's real 1950s UFO investigations.
Project Chrono
Project Chrono is an open-source, multi-physics simulation engine written in C++ and used to model mechanical systems, vehicles, and robots, led by Wisconsin-Madison and Parma.
Project commissioning
Project commissioning is a quality-focused process of verifying and documenting that a facility's systems are designed, installed, tested, and operated to meet the owner's project requirements.
Project Cybersyn
Project Cybersyn (Spanish: Synco) was a cybernetic economic coordination system developed for Chilean president Salvador Allende between 1971 and 1973, directed by Stafford Beer and ended by the 1973 military coup.
Project Echo
Project Echo was NASA's first communications satellite program, in which large inflatable balloon satellites bounced radio signals between ground stations, beginning with Echo 1 in 1960.
Project Excalibur
Project Excalibur was a United States research program at Lawrence Livermore National Laboratory in the 1980s to develop a nuclear-explosion-pumped X-ray laser for ballistic missile defense.
Project Gemini
Project Gemini, also called the Gemini program, was NASA's second human spaceflight program, running from 1961 to 1966 as a bridge between Mercury and Apollo.
Project Grayburn
Project Grayburn is a procurement program of the UK Ministry of Defence to replace the SA80 (L85) service rifle with about 150,000 to 180,000 rifles, still in its concept phase.
Project Greek Island
Project Greek Island was the code name for a secret US government bunker built under the Greenbrier resort in West Virginia to house Congress during nuclear war.
Project Habakkuk
Project Habakkuk, often spelled Habbakuk, was a British Second World War plan to build unsinkable aircraft carriers from pykrete, a frozen wood pulp and water mixture, to fight German U-boats; it was abandoned in early 1944.
Project HARP
Project HARP, or High Altitude Research Project, was a 1960s US-Canada program led by Gerald Bull that used large guns to launch projectiles into the upper atmosphere.