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Technology and the built world

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Ryder (company)

Ryder, formally Ryder System, Inc., is an American logistics and transportation company headquartered in Coral Gables, Florida, founded in 1933 and serving more than 40,000 customers across North America.

Ryfast

Ryfast is a road project in Rogaland, Norway, completed in 2020, giving Ryfylke a ferry-free link to Stavanger through three tunnels, including the world's longest subsea road tunnel.

Ryoan-ji

Ryoan-ji (竜安寺) is a Rinzai Zen temple in northwestern Kyoto, founded in 1450 and best known for its rock garden of fifteen stones on raked white gravel.

Ryobi (brand)

Ryobi is a brand name used for a Japanese die-casting manufacturer founded in Hiroshima in 1943 and for power tools sold under license by Hong Kong-based Techtronic Industries.

Ryōgoku Bridge

Ryōgoku Bridge (両国橋) is a steel bridge over the Sumida River in Tokyo, first built in wood in 1659 and known for its Edo-period entertainment quarter.

Ryogoku Kokugikan

Ryogoku Kokugikan, the national sumo arena of Japan in Sumida, Tokyo, opened in January 1985 as the third hall of that name and hosts three annual Grand Sumo Tournaments.

Ryoichi Nakagawa

Ryoichi Nakagawa (中川良一, 1913–1998) was a Japanese engineer who designed the Nakajima Sakae engine powering the Zero fighter and led Nissan's ECCS electronic engine control, introduced in 1979.

Ryoji Kanno

Ryoji Kanno (菅野了次) is a Japanese battery materials chemist and Institute Professor at Institute of Science Tokyo, known for developing the sulfide solid electrolyte LGPS, reported in 2011.

Ryokan (inn)

A ryokan (旅館) is a traditional Japanese inn unique to Japan, offering tatami rooms, futon bedding, kaiseki meals, and communal baths often fed by natural hot springs.

Ryongsong Residence

The Ryongsong Residence (Residence No. 55) is the principal official residence of Kim Jong Un and Ri Sol-ju, a fortified compound in Pyongyang completed in 1983.

Ryugyong Hotel

The Ryugyong Hotel is an unfinished 105-story, 330-meter pyramid-shaped skyscraper in Pyongyang, North Korea, that has never opened since construction began in 1987.

Ryujinx

Ryujinx was an open-source Nintendo Switch emulator for Windows, Linux, and macOS, created by developer gdkchan and discontinued on October 1, 2024 after contact from Nintendo.

Ryusei (rocket)

Ryusei (流勢, ascending dragon) is a handmade gunpowder rocket flown for about 400 years at the Muku Shrine festival in Chichibu, Japan, to pray for a good harvest.

Ryze Tello

The Ryze Tello is a small camera drone by Shenzhen Ryze Technology, announced in 2018 with DJI flight control and an Intel processor, popular in education.

Ryzen

Ryzen is AMD's family of x86 microprocessors, first launched March 2, 2017 with the Ryzen 7 desktop line built on the Zen core architecture, replacing the FX line.

S (programming language)

S, or the S language, is a programming language for statistical computing and graphics developed at Bell Laboratories from the mid-1970s by John Chambers, Rick Becker, and Allan Wilks.

S band

The S band is a portion of the microwave radio spectrum near 10 cm wavelength, roughly 2 to 3 GHz, used for radar and spacecraft communication.

S Pen

The S Pen is a stylus developed by Samsung for its Galaxy phones and tablets, first introduced in 2011 with the original Galaxy Note and built on Wacom's battery-less EMR technology.

S-100 bus

The S-100 bus, also known as the Altair bus, is a 100-line parallel computer expansion bus designed in 1974 for the MITS Altair 8800 and later standardized as IEEE 696-1983.

S-300

The S-300 is a family of Soviet and Russian long-range surface-to-air missile systems developed from the 1960s; the S-300P entered service in 1979 and variants are widely exported.

S-400 Triumf

The S-400 Triumf (С-400 «Триумф»), NATO reporting name SA-21 Growler, is a Russian mobile surface-to-air missile system developed by Almaz-Antey as successor to the S-300, in service since 2007 and exported to China, India, and Turkey.

S-500

The S-500 Prometey (С-500 «Прометей», Prometheus), designated 55R6M Triumfator-M, is a Russian surface-to-air and anti-ballistic missile system built by Almaz-Antey, designed to intercept ballistic missiles, hypersonic weapons, aircraft, and satellites.

S-520

The S-520 is a Japanese single-stage sounding rocket developed by ISAS to replace the K-9M and K-10, first flown in January 1980 with a 300 km reach.

S-curve motion profile

The S-curve motion profile, also called jerk-limited motion, is a trajectory generator in which acceleration changes gradually, producing an S-shaped velocity curve and less vibration.

S-expressions

An S-expression (symbolic expression) is a notation for tree-structured data using parenthesized lists, originating in John McCarthy's LISP around 1960 and later standardized as a data format for cryptographic certificates and protocols.

S-glass

S-glass is a high-strength alumino-silicate glass fiber offering higher tensile strength, stiffness, and temperature resistance than E-glass, used chiefly in aerospace, military, and high-performance composites despite its higher cost.

S-IVB

The S-IVB, also called Saturn S-IVB, was a Douglas rocket stage powered by one J-2 engine, serving as the Saturn IB's second stage and the Saturn V's third stage.

S-mine

The S-mine, known to Allied soldiers as the Bouncing Betty, was Germany's standard bounding antipersonnel mine of the Second World War, leaping into the air before bursting.

S-OIL

S-OIL (에쓰오일) is a South Korean oil refining and petrochemical company founded in 1976 and headquartered in Seoul; Saudi Aramco's Aramco Overseas Company holds a 63.4 percent stake.

S-train (Copenhagen)

The S-train, or S-tog, is the suburban railway network of Copenhagen, opened in 1934 and operated by DSB on seven lines serving 86 stations, with about 350,000 passengers on a busy weekday.