Portal:Technology

 The Technology Portal 

The wheel, invented sometime before the 4th millennium BC, is one of the most ubiquitous and important technologies. This detail of the "Standard of Ur", c. 2500 BCE., displays a Sumerian chariot

Technology is the application of conceptual knowledge for achieving practical goals, especially in a reproducible way. The word technology can also mean the products resulting from such efforts, including both tangible tools such as utensils or machines, and intangible ones such as software. Technology plays a critical role in science, engineering, and everyday life.

Technological advancements have led to significant changes in society. The earliest known technology is the stone tool, used during prehistoric times, followed by the control of fire, which contributed to the growth of the human brain and the development of language during the Ice Age. The invention of the wheel in the Bronze Age allowed greater travel and the creation of more complex machines. More recent technological inventions, including the printing press, telephone, and the Internet, have lowered barriers to communication and ushered in the knowledge economy. (Full article...)

Recognized articles -

Entries here consist of Good and Featured articles, which meet a core set of high editorial standards.

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  Magdalena was a 17,547 GRT passenger and refrigerated cargo ocean liner that Harland and Wolff built in Belfast in 1948 for Royal Mail Lines (RML). Launched on 11 May 1948, she was the third-largest ship being built in a UK shipyard at that time.
  
  Built as a replacement for a ship lost during the Second World War, she was to serve on route between England and the east coast of South America. She was wrecked on her maiden voyage in 1949, the sixth ship built by Harland and Wolff to suffer this fate. The insurance payout of £2,295,000 was the largest made at the time for a marine casualty in the United Kingdom. Due to changing trading conditions RML decided not to build a replacement vessel. (Full article...)
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  Station platform in 2018

  
  The City Hall station, also known as City Hall Loop station, is a closed station on the IRT Lexington Avenue Line of the New York City Subway. It is located under City Hall Park, next to New York City Hall, in the Civic Center neighborhood of Manhattan in New York City. The station was constructed for the Interborough Rapid Transit Company (IRT) as the southern terminal of the city's first subway line, which was approved in 1900. Construction of the segment of the line that includes the City Hall station started on September 12 of the same year. The station opened on October 27, 1904, as one of the original 28 stations of the New York City Subway. As ridership grew, it was deemed infeasible to lengthen the original platform to accommodate ten-car trains. The station was closed on December 31, 1945, because of its proximity to the Brooklyn Bridge station.
  
  The City Hall station, with its single track and curved side platform, was the showpiece of the original IRT subway. The single platform and mezzanine feature Guastavino tile, skylights, colored glass tilework, and brass chandeliers. The Rafael Guastavino-designed station is unique in the system for the usage of Romanesque Revival architecture. The tunnel passing through the City Hall station is still used as a turning loop for the 6 and <6>​ trains and can be seen from passing trains. The station is a New York City designated landmark and is listed on the National Register of Historic Places. (Full article...)
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  Entrance within Portcullis House

  
  Westminster is a London Underground station in the City of Westminster. It is served by the Circle, District and Jubilee lines. On the Circle and District lines, the station is between St James's Park and Embankment, and on the Jubilee line it is between Green Park and Waterloo. It is in Travelcard Zone 1. The station is located at the corner of Bridge Street and Victoria Embankment and is close to the Houses of Parliament, Westminster Abbey, Parliament Square, Whitehall, Westminster Bridge, and the London Eye. Also close by are Downing Street, the Cenotaph, Westminster Millennium Pier, the Treasury, the Foreign and Commonwealth Office, and the Supreme Court.
  
  The station is in two parts: sub-surface platforms opened in 1868 by the District Railway (DR) as part of the company's first section of the Inner Circle route and deep level platforms opened in 1999 as part of the Jubilee line extension from Green Park to Stratford. A variety of underground and main line services have operated over the sub-surface tracks, but the original station was completely rebuilt in conjunction with the construction of the deep level platforms and Portcullis House, which sits above the station. (Full article...)
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  The brute force algorithm finds a 4-clique in this 7-vertex graph (the complement of the 7-vertex path graph) by systematically checking all C(7,4) = 35 4-vertex subgraphs for completeness.

  
  
  In computer science, the clique problem is the computational problem of finding cliques (subsets of vertices, all adjacent to each other, also called complete subgraphs) in a graph. It has several different formulations depending on which cliques, and what information about the cliques, should be found. Common formulations of the clique problem include finding a maximum clique (a clique with the largest possible number of vertices), finding a maximum weight clique in a weighted graph, listing all maximal cliques (cliques that cannot be enlarged), and solving the decision problem of testing whether a graph contains a clique larger than a given size.
  
  The clique problem arises in the following real-world setting. Consider a social network, where the graph's vertices represent people, and the graph's edges represent mutual acquaintance. Then a clique represents a subset of people who all know each other, and algorithms for finding cliques can be used to discover these groups of mutual friends. Along with its applications in social networks, the clique problem also has many applications in bioinformatics, and computational chemistry. (Full article...)
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  MAX platform, facing west

  
  Willow Creek/Southwest 185th Avenue Transit Center is a multimodal transport hub in Hillsboro, Oregon, United States. Owned and operated by TriMet, it is served by bus and light rail. The transit center is the ninth station eastbound on the Blue Line and a hub for bus routes mostly serving Washington County in the Portland metropolitan area. It is located by the intersection of Southwest Baseline Road and 185th Avenue near the city's boundary with Beaverton.
  
  Opened in 1998, the station was originally conceived as the western terminus of the Westside MAX, but the line was extended further west into Hillsboro, due to population growth occurring at the time the line was being planned. Artwork at the stop represents a reading motif, as a library was planned for the station, but never built. Willow Creek is near the Oregon National Primate Research Center and the rest of the Oregon Health & Science University's West Campus in the Tanasbourne neighborhood. (Full article...)
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  A Lockheed Constellation L-1049, similar to the aircraft that disappeared

  
  Flying Tiger Line Flight 739 (FT739/FTL739) was a Lockheed L-1049 Super Constellation propliner that disappeared on March 16, 1962, over the western Pacific Ocean. The aircraft, which had been chartered by the United States Army, was transporting ninety-six military passengers from Travis Air Force Base in California to Tan Son Nhut International Airport in Saigon, South Vietnam. After refueling at Andersen Air Force Base in Guam, the Super Constellation disappeared while en route to Clark Air Base in the Philippines. All 107 aboard were declared missing and presumed dead.
  
  The airliner's disappearance prompted one of the largest air and sea searches in the history of the Pacific. Aircraft and surface ships from four branches of the U.S. military searched more than 144,000 square miles (370,000 km²) during the course of eight days. A civilian tanker observed what appeared to be an in-flight explosion believed to be the missing Super Constellation, though no trace of wreckage or debris was ever recovered. (Full article...)
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  K-87 is a 8.625-mile-long (13.881 km) north–south state highway in the U.S. state of Kansas. The highway runs from the end of state maintenance, where it continues as 26th Road, in the community of Vliets north to U.S. Route 36 (US 36) west of the community of Baileyville. The highway travels through farmlamd and is a two-lane highway its entire length.
  
  K-87 was first established in October 1932, as a short spur connecting Vliets to K-9. On July 9, 1947, the highway was approved to be extended north to US-36. The entire length of the highway was paved by 1958. Since it was extended north, its alignment has not changed. (Full article...)

Selected picture

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  Mechanical advantage

  Image credit: Prolineserver/Tomia

  This diagram of four pulley systems illustrates how increasing the number of pulleys increases the mechanical advantage, making the load easier to lift. MA is the factor by which a mechanism multiplies the force put into it. In this diagram, 100 newtons is required to lift the weight off the ground. Each additional pulley increases the MA such that the four-pulley system only needs 25 newtons to accomplish the same task, but the rope must be pulled four times as far.
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  Red telephone box

  Photograph: Christoph Braun

  A 'K6' model red telephone box outside of St Paul's Cathedral in London. These kiosks for a public telephone were designed by Sir Giles Gilbert Scott and painted "currant red" for easy visibility. Although such telephone boxes ceased production when the KX series was introduced in 1985, they remain a common sight in Britain and some of its colonies, and are considered a British cultural icon.
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  Movable type

  Photo credit: Willi Heidelbach

  A composing stick and movable type, the system of printing and typography using pieces of metal type, made by casting from matrices struck by letterpunches. The text on the stick reads, "The quick brown fox jumps over the lazy dog and feels as if he were in the seventh heaven of typography together with Hermann Zapf, the most famous artist of the" [sic].
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  Mark IV tank

  Photograph: Peter Trimming

  The Mark IV tank was introduced by the British in May 1917 to fight in World War I. The "female" version, as pictured here, was armed with five machine guns. Production of the Mark IV ceased at the end of the War in 1918. A small number served briefly with other combatants afterwards.
  
  This Mark IV tank, on display in Ashford, Kent, was presented to the town after the end of World War I. The engine was removed to install an electricity substation inside it, though this substation was subsequently removed; the tank's interior is now empty.
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  Apple Bandai Pippin

  Photograph: Evan Amos

  The Apple Bandai Pippin is a multimedia technology console designed by Apple Computer based on the Apple Pippin platform, and produced by Bandai. Only 100,000 of the consoles were produced between its 1996 release and 1997 discontinuation. The Bandai Pippin was intended to create an inexpensive computer aimed mostly at playing CD-based multimedia software, especially games, but also functioning as a thin client.
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  Caliper

  Image credit: Joaquim Alves Gaspar

  An animation showing how to use a vernier caliper, which is a caliper that uses a vernier scale to interpolate linear measurements. Vernier calipers can measure internal and external dimensions using, respectively, the uppermost and lower jaws, and also depths, using the depth probe (located at the right end). In this example, the first two digits (2.4) are decided by the location of the zero of the vernier scale in the centimeter scale, and the last digit (0.07), by the first line of the vernier scale that exactly matches a line of the centimeter scale above.
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  Overhead power line

  Credit: Simon Koopmann

  An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy along large distances. It consists of one or more conductors suspended by towers or utility poles.
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  Escalator

  Credit: Stig Nygaard

  An escalator is a moving staircase for carrying people between floors of a building. The device consists of a motor-driven chain of individual, linked steps that move up or down on tracks, allowing the step treads to remain horizontal.
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  Union Pacific 844

  Photo: Drew Jacksich; edit: Bruce1ee

  Union Pacific 844 at Painted Rocks, Nevada, on a run from Elko to Sparks, on September 15, 2009. Built in 1944, it was the last steam locomotive delivered to Union Pacific and is the only steam locomotive never retired by a North American Class I railroad.
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  Wheel

  Credit: fir0002

  A wheel is a circular component that is intended to rotate on an axial bearing. The wheel is one of the main components of the wheel and axle which is one of the six simple machines.
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  Telephone

  Credit: Berthold Werner

  A telephone, or phone, is a telecommunications device that converts sound, typically the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances through satellite.
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  Filling station

  Photograph: Uwe Aranas

  A filling station in Sabah, Malaysia, operated by Royal Dutch Shell. Filling stations, also known under a wide variety of names, are facilities that sell fuel and engine lubricants for motor vehicles. They include one or more fuel dispensers, which distribute fuels such as gasoline and diesel into the tanks within vehicles and calculate the financial cost of the fuel transferred. Filling stations may also include air compressors and electricity sockets, which may inflate tyres or offer charging stations. Many filling stations also incorporate a convenience store, where customers can purchase snacks and other goods.
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  Trojan Room coffee pot

  Picture: Quentin Stafford-Fraser

  The Trojan Room coffee pot was the inspiration for the world's first webcam. The coffee pot was located in the corridor just outside the so-called Trojan Room within the old Computer Laboratory of the University of Cambridge. The webcam was created in 1991 to help people working in other parts of the building avoid pointless trips to the coffee pot by providing, on the user's desktop computer, a live 128×128 pixel greyscale picture of the state of the coffee pot. The webcam was shut down on 22 August 2001, following the Computer Laboratory's move to the William Gates Building.
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  Building implosion

  Photo credit: Heptagon

  A multiple exposure composite image of the implosion of a chimney at the former brewery "Henninger" in Frankfurt am Main, Germany. This controlled demolition technique involves strategically placing explosive material and timing its detonation so that a structure collapses on itself in a matter of seconds, minimizing the physical damage to its immediate surroundings.
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  Parabolic antenna

  Photo credit: Richard Bartz

  A parabolic antenna, a high-gain reflector antenna used for radio, television and data communications, at Erdfunkstelle Raisting, the largest facility for satellite communication in the world, based in Raisting, Bavaria, Germany. Parabolic antennas work by reflecting electromagnetic radiation off the paraboloid dish to or from the feed horn (center), for reception or transmission respectively.
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  Hybrid-propellant rocket

  Photograph credit: Matt Steiner and Kees08

  A hybrid-propellant rocket is a rocket with an engine that uses propellants in two different phases, one solid and the other gaseous or liquid. The concept can be traced back to at least the 1930s.
  
  This picture shows a transparent 3D-printed hybrid-rocket fuel grain with dual helical fuel ports, a post-combustion chamber, and a de Laval nozzle, photographed prior to the hot-fire test. The motor used nitrous oxide as the oxidizer and Pyrodex pellets for the igniter.
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  Aerospike engine

  Photo credit: Marshall Space Flight Center

  A test firing of twin linear XRS-2200 aerospike engines, originally built for the Lockheed Martin X-33, a next-generation, commercially operated reusable launch vehicle. The aerospike engine is a type of rocket engine that maintains its efficiency across a wide range of altitudes through the use of an aerospike nozzle. A vehicle with an aerospike engine uses 25-30% less fuel at low altitudes, where most missions have the greatest need for thrust.
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  John Herschel

  Photograph: Julia Margaret Cameron; restoration: Adam Cuerden

  John Herschel was an English mathematician, astronomer, chemist, inventor, and experimental photographer. He named seven moons of Saturn and four moons of Uranus, invented the cyanotype and actinometer, and wrote extensively on topics including meteorology, physical geography and the telescope.
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  Nesjavellir

  Photo credit: Gretar Ívarsson

  The Nesjavellir geothermal power plant, located near Þingvellir, Iceland is the largest of five such plants in the country. Because of the high concentration of volcanoes in Iceland, geothermal energy is so inexpensive that in the wintertime, some pavements in Reykjavík and Akureyri are heated.
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  Laptop computer

  Credit: Mike McGregor

  The OLPC XO-1 is an inexpensive subnotebook laptop computer intended to be distributed to children in developing countries.

Main topics

General images -

The following are images from various technology-related articles on Wikipedia.

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  Top 30 AI patent applicants in 2016 (from Emerging technologies)
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  Pont du Gard in France, a Roman aqueduct (from History of technology)
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  Walls at Sacsayhuaman (from History of technology)
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  A rare 1884 photo showing the experimental recording of voice patterns by a photographic process at the Alexander Graham Bell Laboratory in Washington, D.C. Many of their experimental designs panned out in failure. (from Invention)
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  A late Bronze Age sword or dagger blade (from History of technology)
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  Alessandro Volta with the first electrical battery. Volta is recognized as an influential inventor. (from Invention)
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  The compartmented water wheel, here its overshot version (from History of technology)
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  A variety of stone tools (from History of technology)
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  NASA Fuel cell stack
  Direct-methanol cell. (from Emerging technologies)
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  An axehead made of iron, dating from the Swedish Iron Age (from History of technology)
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  Agriculture preceded writing in the history of technology. (from History of technology)
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  Solid-state air batteries
  Li-Air composition (from Emerging technologies)
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  The wheel, invented sometime before the 4th millennium BC, is one of the most ubiquitous and important technologies. This detail of the "Standard of Ur", c. 2500 BCE., displays a Sumerian chariot. (from History of technology)
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  3D printer (from Emerging technologies)
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  Ford assembly line, 1913. The magneto assembly line was the first. (from History of technology)
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  Eric M. C. Tigerstedt (1887–1925) was known as a pioneer of sound-on-film technology. Tigerstedt in 1915. (from Invention)
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  'BUILD YOUR OWN TELEVISION RECEIVER.' Science and Invention magazine cover, November 1928 (from Invention)
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  The preserved Rocket (from History of technology)
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  Edison electric light bulbs 1879–80 (from History of technology)
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  The Gutenberg press was voted the most important invention of the second millennium. (from Invention)
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  Dome of Florence Cathedral (from History of technology)
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  Thomas Edison with his second phonograph, photographed by Levin Corbin Handy in Washington, April 1878 (from History of technology)
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  A water-powered mine hoist used for raising ore, ca. 1556 (from History of technology)
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  Design for a flying machine (c.1488) by da Vinci (from History of technology)
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  Self-replicating 3D printer (from Emerging technologies)
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  Newcomen steam engine for pumping mines (from History of technology)
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  Clock from Salisbury Cathedral, ca. 1386 (from History of technology)

Did you know (auto-generated) -

• ... that Turkey's Anadolu Shipyard signed a contract with India's Hindustan Shipyard to transfer technology for the building of five fleet support ships for the Indian Navy?
• ... that touch-screen technology, pay-at-the-pump, car phones, and Coca-Cola Cherry were shown at the 1982 World's Fair?
• ... that Peter Corby's electric trouser press used technology designed for Concorde?
• ... that Justin Yu, the current Classic Tetris World Champion, is also a cellist in MIT's video game orchestra?
• ... that Mary Earle was born near Ben Nevis, and although she became a professor of food technology in New Zealand, she never forgot her Scottish roots?
• ... that racing driver James Sofronas worked as a salesman for a technology company to buy the Nissan NX 2000 required for his first competitive race?
• ... that when Chorus Systèmes SA was founded in 1986, French technology start-up companies were rare?
• ... that Research Policy is regarded as the leading journal in the field of innovation studies?

Top 10 WikiProject Technology popular articles of the month

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  Logo used since 2017

  
  YouTube is an American online video sharing platform owned by Google. Accessible worldwide, YouTube launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim, three former employees of PayPal. Headquartered in San Bruno, California, United States, it is the second most visited website in the world, after Google Search. YouTube has more than 2.5 billion monthly users, who collectively watch more than one billion hours of videos every day. , videos were being uploaded to the platform at a rate of more than 500 hours of content per minute, and as of 2021, there were approximately 14 billion videos in total. (Full article...)
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  ChatGPT is a chatbot and virtual assistant developed by OpenAI and launched on November 30, 2022. Based on large language models (LLMs), it enables users to refine and steer a conversation towards a desired length, format, style, level of detail, and language. Successive user prompts and replies are considered at each conversation stage as context. (Full article...)
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  Facebook is a social media and social networking service owned by the American technology conglomerate Meta. Created in 2004 by Mark Zuckerberg with four other Harvard College students and roommates Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes, its name derives from the face book directories often given to American university students. Membership was initially limited to Harvard students, gradually expanding to other North American universities. Since 2006, Facebook allows everyone to register from 13 years old, except in the case of a handful of nations, where the age limit is 14 years. , Facebook claimed almost 3 billion monthly active users. As of October 2023, Facebook ranked as the 3rd most visited website in the world, with 22.56% of its traffic coming from the United States. It was the most downloaded mobile app of the 2010s. (Full article...)
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  WhatsApp (officially WhatsApp Messenger) is an instant messaging (IM) and voice-over-IP (VoIP) service owned by technology conglomerate Meta. It allows users to send text, voice messages and video messages, make voice and video calls, and share images, documents, user locations, and other content. WhatsApp's client application runs on mobile devices, and can be accessed from computers. The service requires a cellular mobile telephone number to sign up. In January 2018, WhatsApp released a standalone business app called WhatsApp Business which can communicate with the standard WhatsApp client. (Full article...)
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  The Google logo used since 2015

  
  Google LLC (/ˈɡuːɡəl/ , GOO-ghəl) is an American multinational corporation and technology company focusing on online advertising, search engine technology, cloud computing, computer software, quantum computing, e-commerce, consumer electronics, and artificial intelligence (AI). It has been referred to as "the most powerful company in the world" and is one of the world's most valuable brands due to its market dominance, data collection, and technological advantages in the field of AI. Google's parent company, Alphabet Inc. is one of the five Big Tech companies, alongside Amazon, Apple, Meta, and Microsoft. (Full article...)
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  Musk in 2022

  
  Elon Reeve Musk (/ˈiːlɒn/; born June 28, 1971) is a businessman and investor known for his key roles in space company SpaceX and automotive company Tesla, Inc. Other involvements include ownership of X Corp., formerly Twitter, and his role in the founding of The Boring Company, xAI, Neuralink and OpenAI. He is one of the wealthiest people in the world; , Forbes estimates his net worth to be US$210 billion. (Full article...)
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  Meteor Lake is Intel's codename for the first generation of Intel Core Ultra mobile processors, and was officially launched on December 14, 2023. It is the first generation of Intel mobile processors to use a chiplet architecture which means that the processor is a multi-chip module. Tim Wilson led the system on a chip development for this generation microprocessor. (Full article...)
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  Final logo, used from 2012 to 2023

  
  Twitter was an American social networking service that was rebranded as X in 2023. Established in March 2006, it grew to become one of the world's largest social media websites and the fifth-most visited website in the world. It was launched in July 2006, and its creators Jack Dorsey, Noah Glass, Biz Stone, and Evan Williams, established Twitter, Inc. in San Francisco, California, as its managing company in April 2007. (Full article...)
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  Video views per week of a viral video (Gangnam Style), illustrating viral growth to peak weekly viewership, in this case, in the eleventh week after it was posted.

  
  A viral video is a video that becomes popular through a viral process of Internet sharing, typically through video sharing websites such as YouTube as well as social media and email. For a video to be shareable or spreadable, it must focus on the social logics and cultural practices that have enabled and popularized these new platforms. (Full article...)
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  Portrait by Joseph Duplessis, 1778

  
  Benjamin Franklin FRS FRSA FRSE (January 17, 1706 [O.S. January 6, 1705] – April 17, 1790) was an American polymath: a leading writer, scientist, inventor, statesman, diplomat, printer, publisher, and political philosopher. Among the most influential intellectuals of his time, Franklin was one of the Founding Fathers of the United States; a drafter and signer of the Declaration of Independence; and the first postmaster general. (Full article...)

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See also: 2024 in science and technology

May 10, 2024 – Israel–Hamas war protests

Police dismantle encampments and arrest dozens of students protesting at the Massachusetts Institute of Technology in Cambridge, Massachusetts, and the University of Pennsylvania in Philadelphia, Pennsylvania. (Reuters)

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