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 to achieve 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 prehistory, followed by the control of fire—which in turn contributed to the growth of the human brain and the development of language during the Ice Age, according to the cooking hypothesis. 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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  Laurence Harbor was a proposed station that was to be located along New Jersey Transit's North Jersey Coast Line between the South Amboy and Aberdeen-Matawan stations. The station was to be in the Laurence Harbor section of Old Bridge, New Jersey.
  
  The station was first proposed in the 1980s, although no progress was made until August 2001, when the transportation officials said the official station could be constructed within several years. After several years of proposals, along with the passing of a high opposer in 2003, the station came up once again in 2008. That year, the proposed Metropark South was brought back to the Old Bridge council by developer Michael Alfieri. His proposal also brought up the plans for new residential homes, commercial businesses along with the new station. The proposal was conditionally accepted in November of that year. As of 2009, there is no forward on the actual station being constructed. (Full article...)
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  A thermal imaging camera (colloquially known as a TIC) is a type of the thermographic camera used in firefighting. By rendering infrared radiation as visible light, such cameras allow firefighters to see areas of heat through smoke, darkness, or heat-permeable barriers. Thermal imaging cameras are typically handheld, but may be integrated with other pieces of equipment such as helmets and SCBAs. They are constructed using heat- and water-resistant housings, and ruggedized to withstand the hazards of fireground operations, often meeting the requirements of NFPA 1801, Standard on Thermal Imagers for the Fire Service.
  
  While they are expensive pieces of equipment, their popularity and adoption by firefighters in the United States is increasing markedly due to the increased availability of government equipment grants following the September 11 attacks in 2001. Thermal imaging cameras pick up body heat, and they are normally used in cases where people are trapped where rescuers cannot find them. (Full article...)
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  Partition of a directed graph into a minimum feedback arc set (red dashed edges) and a maximum acyclic subgraph (blue solid edges)

  
  In graph theory and graph algorithms, a feedback arc set or feedback edge set in a directed graph is a subset of the edges of the graph that contains at least one edge out of every cycle in the graph. Removing these edges from the graph breaks all of the cycles, producing an acyclic subgraph of the given graph, often called a directed acyclic graph. A feedback arc set with the fewest possible edges is a minimum feedback arc set and its removal leaves a maximum acyclic subgraph; weighted versions of these optimization problems are also used. If a feedback arc set is minimal, meaning that removing any edge from it produces a subset that is not a feedback arc set, then it has an additional property: reversing all of its edges, rather than removing them, produces a directed acyclic graph.
  
  Feedback arc sets have applications in circuit analysis, chemical engineering, deadlock resolution, ranked voting, ranking competitors in sporting events, mathematical psychology, ethology, and graph drawing. Finding minimum feedback arc sets and maximum acyclic subgraphs is NP-hard; it can be solved exactly in exponential time, or in fixed-parameter tractable time. In polynomial time, the minimum feedback arc set can be approximated to within a polylogarithmic approximation ratio, and maximum acyclic subgraphs can be approximated to within a constant factor. Both are hard to approximate closer than some constant factor, an inapproximability result that can be strengthened under the unique games conjecture. For tournament graphs, the minimum feedback arc set can be approximated more accurately, and for planar graphs both problems can be solved exactly in polynomial time. (Full article...)
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  Tromsø Satellite Station (2013)

  
  Tromsø Satellite Station (Norwegian: Tromsø Satellittstasjon, TSS), until 1988 known as Tromsø Telemetry Station (Norwegian: Tromsø telemetristasjon), is a satellite earth station located in Tromsø, Norway. The facility is owned by Kongsberg Satellite Services (KSAT), a joint venture between the Kongsberg Group and the Norwegian Space Centre (NSC). In addition to hosting its own antennas serving thirty satellites, TSS acts as the center-point of KSAT's operations and provides backbone services for the high Arctic Svalbard Satellite Station (SvalSat) and the Antarctic Troll Satellite Station (TrollSat).
  
  Originally proposed in 1965, the station was established by the Royal Norwegian Council for Scientific and Industrial Research (NTNF) in 1967 in close cooperation with the Norwegian Defence Research Establishment (NDRE) and located adjacent to Tromsø Geophysical Observatory. From its inception until 1974, it served low-Earth-orbit (LEO) satellites operated by the European Space Research Organization (ESRO). To a lesser extent it was also used by Canadian Space Agency and National Aeronautics and Space Administration (NASA) LEO satellites. Norway's non-membership in ESRO and later the European Space Agency (ESA) caused Tromsø to not become a ground station for Landsat. A gradual increase in operations occurred from 1982, such as for the International Cospas-Sarsat Programme and the European Remote-Sensing Satellite. TSS became part of NSC in 1990, although it was partially sold to the Swedish Space Corporation (SSC) in 1995. SvalSat merged with TSS in 2002 to form KSAT. (Full article...)
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  James Gayley (October 11, 1855 – February 25, 1920) was an American chemist and steel metallurgist who served as managing director of the Carnegie Steel Company, and as the first vice president of U.S. Steel from 1901 to 1908. He is credited with many inventions which greatly improved the fields of steel and iron making. For his contributions in the field of metallurgy, he was awarded the Elliott Cresson Medal in 1909, and the Perkin Medal in 1913. (Full article...)
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  1973 image of the three barges; Elmer S. Dailey is the rightmost

  
  Elmer S. Dailey, originally known as the Claire B. Follette, is a wooden barge built by William H. Follette in 1915 at Tonawanda, New York, and rebuilt and renamed in 1928 by Brown Drydock on Staten Island, New York. It was used to transport materials from New York, New Jersey and Connecticut. It is the only known surviving Erie Canal boat and is one of a few remaining wooden-hulled canal boats. It sank in 1974 along with the Priscilla Dailey and the Berkshire No. 7 in the harbor of Bridgeport, Connecticut on the west side of the Pequonnock River. It has deteriorated to the point that a salvage operation could result in it breaking apart. It was added to the National Register of Historic Places on December 21, 1978. (Full article...)
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  State Route 542 (SR 542) is a 57.24-mile-long (92.12 km) state highway in the U.S. state of Washington, serving Mount Baker in Whatcom County. SR 542 travels east as the Mount Baker Highway from an interchange with Interstate 5 (I-5) in Bellingham through the Nooksack River valley to the Mt. Baker Ski Area at Austin Pass. It serves as the main highway to Mount Baker and the communities of Deming, Kendall, and Maple Falls along the Nooksack River. The highway was constructed in 1893 by Whatcom County as a wagon road between Bellingham and Maple Falls and was added to the state highway system as a branch of State Road 1 in 1925. The branch was transferred to Primary State Highway 1 (PSH 1) during its creation in 1937 and became SR 542 during the 1964 highway renumbering. (Full article...)

Selected picture

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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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  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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  GameCube

  Photo: Evan Amos

  The GameCube is a sixth generation video game console released by Nintendo beginning in 2001. Meant as a successor to the Nintendo 64, the GameCube sold approximately 22 million units worldwide. It was the third most-successful console of its generation, behind Sony's PlayStation 2 and Microsoft's Xbox. The GameCube was succeeded by the Wii in 2006.
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  Empire State Building

  Image credit: Lewis Hine

  A structural worker bolts beams on the framework during the construction of the Empire State Building in New York City. The 1,250-foot (380 m) building opened on May 1, 1931, at the time the tallest building in the world, overtaking the Chrysler Building (seen to the right), which had just been completed the year before. The addition of a pinnacle and antennas later increased its overall height to 1,472 feet (449 m).
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  Thermoplastic-sheathed cable

  Photograph credit: Petar Milošević

  A thermoplastic-sheathed cable consists of a toughened outer thermoplastic sheath of polyvinyl chloride, covering one or more individual annealed copper conductors. Each of the current-carrying conductors in the "core" is insulated by an individual thermoplastic sheath, coloured to indicate the purpose of the conductor concerned. The protective earth conductor may also be covered with insulation, although, in some countries, this conductor may be left as bare copper. The type of thermoplastic, the dimensions of the conductors and the colour of their individual insulation are specified by the regulatory bodies in the various countries concerned.
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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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  Sukhoi Su-30

  Photo: Sergey Krivchikov

  The Sukhoi Su-30 is a twin-engine, two-seat supermanoeuverable fighter aircraft developed by Russia's Sukhoi Aviation Corporation. It is a multirole fighter for all-weather, air-to-air and air-to-surface deep interdiction missions. Its primary users are Russia, India, China, Venezuela, and Malaysia.
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  BMW S1000RR

  Photograph credit: Stefan Krause

  The BMW S1000RR is a sport bike made by BMW Motorrad. It was introduced in 2008, initially for competition in the 2009 Superbike World Championship, and has been in commercial production since then. Powered by a 999 cc (61.0 cu in) four-cylinder engine, redlined at 14,200 rpm, it delivers 133.6 kW (179.2 hp; 181.6 PS) to the rear wheel, making it the most powerful motorcycle in the class. Rubén Xaus and Troy Corser rode the bike for its inaugural Superbike World Championship in 2009, gaining highest finishes of fifth and seventh respectively, but it achieved greater success in the 2010 FIM Superstock 1000 championship season, with rider Ayrton Badovini winning every single race but one on the S1000RR.
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  Wiesen Viaduct

  Photograph: David Gubler

  The Wiesen Viaduct is a single-track railway viaduct (concrete blocks with dimension stone coverage) which spans the Landwasser southwest of the hamlet of Wiesen, Switzerland. Designed by Henning Friedrich, then the chief engineer of the Rhaetian Railway, it was built between 1906 and 1909 by the contractor G. Marasi (Westermann & Cie, Zürich) under the supervision of P. Salaz and Hans Studer (RhB). The Rhaetian Railway still owns and uses the viaduct today for regular service with 29 passenger trains per day. An important element of the Davos–Filisur railway, the viaduct is 88.9 metres (292 ft) high, 210 metres (690 ft) long, and has a main span of 55 metres (180 ft). In 1926, the viaduct was the inspiration for Ernst Ludwig Kirchner's painting Brücke bei Wiesen.
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  Thomas Edison

  Photo: Bachrach Studios; Restoration: Michel Vuijlsteke

  Thomas Edison (1847–1931) was an American inventor, scientist and businessman who developed many devices that greatly influenced life around the world, including the phonograph, the motion picture camera, and a long-lasting, practical electric light bulb. Dubbed "The Wizard of Menlo Park" (now Edison, New Jersey) by a newspaper reporter, he was one of the first inventors to apply the principles of mass production and large teamwork to the process of invention, and therefore is often credited with the creation of the first industrial research laboratory. Edison is considered one of the most prolific inventors in history, holding 1,093 U.S. patents in his name, as well as many patents in the United Kingdom, France and Germany.
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  Flat-four engine

  Photograph: ULPower Aero Engines

  The ULPower UL260i, a flat-four engine produced by ULPower Aero Engines of Belgium. Flat-four engines are flat engines with four cylinders arranged horizontally in two banks of two cylinders on each side of a central crankcase; they can be used in cars, motorcycles, or aircraft. This type of engine tends to be well-balanced and have efficient cooling, but is expensive to manufacture and considerably wider than other engines.
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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.
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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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  Assut de l'Or Bridge

  Photograph: Diego Delso

  The Assut de l'Or Bridge is a white single-pylon cable-stayed bridge in the City of Arts and Sciences, Valencia, Spain. Completed in 2008, it was designed by Valencian architect and civil engineer Santiago Calatrava as a variant of his cantilever spar cable-stayed bridge in Seville.
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  Tugboat

  Image credit: Al2/Lycaon/Jeff Dahl

  A diagram showing the parts of a tugboat, a boat used to maneuver large ships in harbours, over the open sea, or through rivers and canals. They also tow barges, disabled ships, and oil rigs. Equipped with powerful engines producing thousands of horsepower, extensive rigging equipment, and a fender of tires for protection, tugboats can push or tow large vessels with high precision and speed.
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  N700 Series Shinkansen

  Photograph credit: Dllu

  
  
  

  
  The N700 Series Shinkansen is a Japanese Shinkansen high-speed train with tilting capability developed jointly by JR Central and JR West. It has been used on the Tokaido and San'yō Shinkansen lines since 2007. This photograph shows the train travelling at approximately 300 km/h through Himeji Station, and was captured with a line scan camera using strip photography.
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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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  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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  Curiosity (rover)

  Photograph: NASA

  A self-portrait by the Mars rover Curiosity on October 31, 2012. The mosaic is stitched from a set of 55 images taken by the Mars Hand Lens Imager at "Rocknest," the spot in Gale crater where the mission's first scoop sampling took place. Self-portraits such as this help NASA document the state of the rover and track changes, such as dust accumulation and wheel wear.
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  Commodore 64

  Photo: Evan Amos

  The Commodore 64 is an 8-bit home computer introduced in 1982 by Commodore International. Its low retail price and easy availability led to the system becoming the market leader for three years. It remains the best-selling single personal computer model of all time.

Main topics

General images -

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

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  A water-powered mine hoist used for raising ore, ca. 1556 (from History of technology)
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  The compartmented water wheel, here its overshot version (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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  Walls at Sacsayhuaman (from History of technology)
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  Ford assembly line, 1913. The magneto assembly line was the first. (from History of technology)
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  Top 30 AI patent applicants in 2016 (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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  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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  NASA Fuel cell stack
  Direct-methanol cell (from Emerging technologies)
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  Johannes Gutenberg's printing press was voted the most important invention of the second millennium. (from Invention)
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  Alessandro Volta with the first electrical battery. Volta is recognized as an influential inventor. (from Invention)
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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)
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  3D printer (from Emerging technologies)
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  Design for a flying machine (c.1488) by da Vinci (from History of technology)
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  Pont du Gard in France, a Roman aqueduct (from History of technology)
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  Dome of Florence Cathedral (from History of technology)
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  The preserved Rocket (from History of technology)
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  Solid-state air batteries
  Li-Air composition (from Emerging technologies)
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  'BUILD YOUR OWN TELEVISION RECEIVER.' Science and Invention magazine cover, November 1928 (from Invention)
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  A variety of stone tools (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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  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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  Edison electric light bulbs 1879–80 (from History of technology)
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  Agriculture preceded writing in the history of technology. (from History of technology)
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  A late Bronze Age sword or dagger blade (from History of technology)

Did you know (auto-generated) -

• ... that Justin Yu, the current Classic Tetris World Champion, is also a cellist in MIT's video game orchestra?
• ... that Guy Parmelin, now President of Switzerland, opened the study program of cyber security of the Lucerne School of Information Technology in 2018?
• ... that it was Caltech experimental physicist Rana X. Adhikari's idea to build a gravitational-wave observatory in India?
• ... that Suresh Jadhav led the development of the COVID-19 vaccine marketed as Covishield?
• ... that Henry E. Sigerist felt "depressed" after reading A History of Science, Technology, and Philosophy in the 16th and 17th Centuries?
• ... that ice XVII (structure shown) potentially has a use in green technology as a medium for storing hydrogen?
• ... that Kathanar – The Wild Sorcerer is being shot on a custom-built studio spanning 45,000 square feet (4,200 m²), utilizing the virtual production technology?
• ... that Thomas Hall made an electric train that received power from the rails on which it travelled instead of onboard batteries, a new technology at the time?

Top 10 WikiProject Technology popular articles of the month

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  Musk in 2018

  
  Elon Reeve Musk (/ˈiːlɒn/; born June 28, 1971) is a businessman known for his key roles in the space company SpaceX and the automotive company Tesla, Inc. His other involvements include ownership of X Corp., the company that operates the social media platform X (formerly Twitter), and his role in the founding of the Boring Company, xAI, Neuralink, and OpenAI. In November 2024, United States president-elect Donald Trump appointed Musk as the co-chair of the proposed Department of Government Efficiency (DOGE) in the second Trump administration. Musk is the wealthiest individual in the world; as of November 2024, Forbes estimates his net worth to be US$304 billion. (Full article...)
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  YouTube search results

  
  YouTube is an American online video sharing platform owned by Google. YouTube was founded 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. In January 2024, YouTube had more than 2.7 billion monthly active users, who collectively watched more than one billion hours of videos every day. As of May 2019, videos were being uploaded to the platform at a rate of more than 500 hours of content per minute, and as of 2023, there were approximately 14 billion videos in total. (Full article...)
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  ChatGPT is a generative artificial intelligence (AI) chatbot developed by OpenAI and launched in 2022. It is based on the GPT-4o large language model (LLM). ChatGPT can generate human-like conversational responses, and enables users to refine and steer a conversation towards a desired length, format, style, level of detail, and language. It is credited with accelerating the AI boom, which has led to ongoing rapid investment in and public attention to the field of artificial intelligence. Some observers have raised concern about the potential of ChatGPT and similar programs to displace human intelligence, enable plagiarism, or fuel misinformation. (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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  Facebook is a social media and social networking service owned by 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. As of December 2022, Facebook claimed almost 3 billion monthly active users. As of October 2023, Facebook ranked as the third-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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  The Google logo used since 2015

  
  Google LLC (/ˈɡuːɡəl/ GOO-gəl) is an American-based 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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  The Doppler building in Seattle,
  Amazon's headquarters

  
  Amazon.com, Inc., doing business as Amazon (/ˈæməzɒn/, AM-ə-zon; UK also /ˈæməzən/, AM-ə-zən), is an American multinational technology company engaged in e-commerce, cloud computing, online advertising, digital streaming, and artificial intelligence. Founded in 1994 by Jeff Bezos in Bellevue, Washington, the company originally started as an online marketplace for books but gradually expanded its offerings to include a wide range of product categories, referred to as "The Everything Store". Today, Amazon is considered one of the Big Five American technology companies, the other four being Alphabet, Apple, Meta, and Microsoft. (Full article...)
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  Artificial intelligence (AI), in its broadest sense, is intelligence exhibited by machines, particularly computer systems. It is a field of research in computer science that develops and studies methods and software that enable machines to perceive their environment and use learning and intelligence to take actions that maximize their chances of achieving defined goals. Such machines may be called AIs. (Full article...)
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  Logo used since 2014

  
  Netflix is an American subscription video on-demand over-the-top streaming service. The service primarily distributes original and acquired films and television shows from various genres, and it is available internationally in multiple languages. (Full article...)
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  Since late 2009, the headquarters of the Internet Archive has been the building that formerly housed the Fourth Church of Christ, Scientist in San Francisco, California.

  
  
  The Internet Archive is an American non-profit organization founded in 1996 by Brewster Kahle that runs a digital library website, archive.org. It provides free access to collections of digitized media including websites, software applications, music, audiovisual, and print materials. The Archive also advocates a free and open Internet. Its mission is committing to provide "universal access to all knowledge". (Full article...)

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See also: 2024 in science and technology

November 16, 2024 – 2024 Wuxi stabbing attack

Eight people are killed and 17 others are injured in a stabbing spree at the Wuxi Institute of Technology in Yixing, Jiangsu, China. The suspect, a 21-year-old student, is arrested. (CNN) (Reuters)

September 23, 2024 –

Swedish lithium-ion technology developer Northvolt announces revised company operational scopes and its intention to layoff 1,600 workers in the country. (CBC)

September 13, 2024 – Russian invasion of Ukraine

Reuters reports that Russia has begun production of thousands of Garpiya-A1 long-range combat drones used against Ukrainian civilian and military targets, that incorporate engines, parts, and technology from China. (Reuters)

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