X1, X-1 or X-one may refer to:

Transportation

Aircraft

Bell X-1 The Bell X-1 (Bell Model 44) is a rocket engine–powered aircraft, designated originally as the XS-1, and was a joint National Advisory Committee for Aeronautics– U.S. Army Air Forces–U.S. Air Force supersonic research project built by Be ...

, the first aircraft to exceed the speed of sound in controlled level flight

Automobiles

BMW X1 The BMW X1 is a line of subcompact luxury crossovers produced by BMW. Debuted in 2009, the first-generation X1 has been based on the E90 3 Series and offers rear-wheel drive layout as standard. At its introduction, it was positioned as the sm ...

, a 2009–present German subcompact luxury SUV *

Geely Yuanjing X1 The Geely Yuanjing X1 is a mini CUV produced by Chinese manufacturer Geely slotting below the Geely Yuanjing X3. In 2020 Geely phased out the mini hatchback. Background As Crossovers and SUV are being more favored by Chinese people, most Chines ...

, a 2017–2021 Chinese mini crossover *

Lada X-1 The Lada X-1 was a concept car designed by Lada in 1981. It can be seen as the forerunner of modern MPVs. The shape was very aerodynamic and like the later Fiat Multipla it also had the headlights up by the windscreen. The length of the car was 4 ...

, a 1981 Soviet concept MPV * McLaren X-1, a 2012 British one-off sports car based on the 12C *

Red Bull X1 The Red Bull X2010, originally named Red Bull X1, is a fictional prototype vehicle featured in the PlayStation 3 video games ''Gran Turismo 5'' and ''Gran Turismo 6''. A full-size, non-functioning model appeared at the Goodwood Festival of Speed ...

, the former name of the Red Bull X2010, a fictional car created for the game ''Gran Turismo 5'' *

Wrightspeed X1 The Wrightspeed X1 is a one-off Ariel Atom heavily modified to use an all-electric powertrain. The Atom was chosen for its light weight and efficient design. The electric motor and inverter are sourced from AC Propulsion, makers of the AC Propul ...

, a 2008 electric sports car prototype based on the Ariel Atom

Bus routes

* X1 (Metrobus), a bus route in Washington, District of Columbia, United States *

X1 (New York City bus) The Metropolitan Transportation Authority (MTA) operates 80 express bus routes in New York City, United States. Generally, express routes operated by MTA Bus Company are assigned multi-borough (BM, BxM, QM, SIM) prefixes. Exceptions to this rule ...

, a bus route in New York City, New York, United States *

X1 Steel Link Bus Rapid Transit North is a bus rapid transit scheme introduced by the South Yorkshire Passenger Transport Executive in England. It consists of one route operated by First South Yorkshire between Sheffield and Rotherham. History In November 2 ...

, a bus rapid transit service between Sheffield, Rotherham, and Maltby in England, United Kingdom * Excel X1, a bus route from Lowestoft to Peterborough in England, United Kingdom * X1 Glasgow–Hamilton, a former bus route in Scotland

Cycles

Sinclair X-1 The Sinclair X-1 was a two-wheel electric vehicle invented in Britain by Sir Clive Sinclair. The X-1 was announced in November 2010 and was expected to be available from July 2011 at the price of £595. However, it failed to reach the market. Ref ...

, an electrically assisted faired recumbent bicycle * Yamaha X-1, a commuter-style motorbike

Rail transport

SL X1 X1 was a series of two-car electric multiple units (twin units) operated by Greater Stockholm Transport (SL) on the Stockholm commuter rail. The X1 was operated in sets of up to five units, making ten-car trains, each unit consisting of one m ...

, a former Swedish commuter train built by ASEA * LNER Class X1, a single locomotive rebuilt several times in it’s history

Watercraft

X1 (dinghy) The X1 is a fast, light-weight sailing dinghy designed for sailing on rivers, estuaries and inland waters by Phil Morrison (yachts), Phil Morrison. The dinghy is sailed by 2 or 3 people and has a mainsail, main, a jib and a Spinnaker#Symmetric, ...

, a fast, light-weight sailing dinghy designed for inland racing *

X-1 Submarine ''X-1'' (or SS X-1) was one of the United States Navy's only Midget Submarines (but see the NR-1 Deep Submergence Craft). She was designed under project SCB 65; laid down on 8 June 1954, at Deer Park, Long Island, New York, by the Engine Divisi ...

, the United States Navy's only midget submarine *

HM Submarine X1 HM Submarine ''X1'' was a British submarine of the interwar period. Conceived and designed as a submersible commerce raider for the Royal Navy; at the time of her launching she was the largest submarine in the world. For Britain, the idea of ...

, a Royal Navy submarine

Technology

Sharp X1 The , sometimes called the Sharp X1 or CZ-800C, is a series of home computers released by Sharp Corporation from 1982 to 1988. It is based on a Zilog Z80 CPU. The RGB display monitor for the X1 had a television tuner, and a computer screen c ...

, a Japanese home computer manufactured by the Sharp Corporation *

Xbox One The Xbox One is a home video game console developed by Microsoft. Announced in May 2013, it is the successor to Xbox 360 and the third base console in the Xbox series of video game consoles. It was first released in North America, parts of ...

, a video game console * a one-lane

PCI Express PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe or PCI-e, is a high-speed serial computer expansion bus standard, designed to replace the older PCI, PCI-X and AGP bus standards. It is the common ...

slot *

Cray X1 The Cray X1 is a non-uniform memory access, vector processor supercomputer manufactured and sold by Cray Inc. since 2003. The X1 is often described as the unification of the Cray T90, Cray SV1, and Cray T3E architectures into a single machine. The ...

, a supercomputer sold since 2003 *

Electrologica X1 The Electrologica X1 was a digital computer designed and manufactured in the Netherlands from 1958 to 1965. About thirty were produced and sold in the Netherlands and abroad. The X1 was designed by the Mathematical Centre in Amsterdam, an academ ...

, an early Dutch computer *

Sony Ericsson XPERIA X1 The Xperia X1 (codenamed HTC Kovsky) is a high-end smartphone from Sony Ericsson, and is the first in the manufacturer's Xperia series. The phone was designed and built by Taiwanese OEM HTC. The X1 was first presented at the 2008 Mobile World Co ...

, a mobile phone *

ThinkPad X1 Carbon The ThinkPad X1 series is a line of high-end ThinkPad laptops and tablets produced by Lenovo. The current model list contains six lines of machines: * X1 Carbon - mainstream premium 14-inch model * X1 Yoga - the convertible 14-inch version ** ...

, a high-end notebook computer released by Lenovo in 2012 *

X1 (software company) X1 Discovery, Inc., previously known as X1 Technologies, Inc., is a privately held software company, based in Pasadena, California, United States, that develops and markets products for people and organizations that need to find information quic ...

formerly known as X1 Technologies, Inc. *

Tegra X1 Tegra is a system on a chip (SoC) series developed by Nvidia for mobile devices such as smartphones, personal digital assistants, and mobile Internet devices. The Tegra integrates an ARM architecture central processing unit (CPU), graphics p ...

, a system on a chip released by Nvidia in 2015 * X1, an IPTV-based cable television hardware platform developed by

Comcast Comcast Corporation (formerly known as American Cable Systems and Comcast Holdings),Before the AT&T merger in 2001, the parent company was Comcast Holdings Corporation. Comcast Holdings Corporation now refers to a subsidiary of Comcast Corpora ...

Arts, entertainment, and media

X1 (band) X1 (; ko, 엑스원, ekseuwon) was a South Korean boy group formed by CJ ENM through the Mnet reality competition show ''Produce X 101''. The group was composed of eleven members: Kim Yo-han, Kim Woo-seok, Han Seung-woo, Song Hyeong-jun, Cho ...

, a South Korean boy band formed through ''

Produce X 101 ''Produce X 101'' () is a 2019 South Korean boy group survival reality show on Mnet and the fourth season of the ''Produce 101'' franchise. The public, referred to as "national producers", "produces" a boy band by choosing 11 members among the ...

'' *

X1 (rapper) Bruce David Sandlin (March 6, 1979 – July 4, 2007), better known by his stage name X1, was an American rapper best known in the 90s as a member of the Gang Green and affiliated with Onyx. X1 was found dead in his home in Las Vegas on July 4, ...

(1979–2007), American rapper *

X Minus One ''X Minus One'' is an American half-hour science fiction radio drama series that was broadcast from April 24, 1955, to January 9, 1958, in various timeslots on NBC. Known for high production values in adapting stories from the leading American a ...

, a 1950s American radio show * ''X-Men'' (film), the first film in the ''X-Men'' franchise *

X-One ''XONE'' (formerly ''X360'') was a monthly magazine produced by Imagine Publishing in the United Kingdom. XONE was the UK's #1 selling independent dedicated Xbox 360 and Xbox One magazine, covering news, previews and reviews. The magazine's commu ...

, monthly magazine produced by Imagine Publishing

Other

* ''x''⁻¹, the

multiplicative inverse In mathematics, a multiplicative inverse or reciprocal for a number ''x'', denoted by 1/''x'' or ''x''−1, is a number which when Multiplication, multiplied by ''x'' yields the multiplicative identity, 1. The multiplicative inverse of a rat ...

of ''x'' (another way to denote ''1⁄x'', one divided by ''x'') *

Cygnus X-1 Cygnus X-1 (abbreviated Cyg X-1) is a galactic X-ray source in the constellation Cygnus and was the first such source widely accepted to be a black hole. It was discovered in 1964 during a rocket flight and is one of the ...

and

Scorpius X-1 Scorpius X-1 is an X-ray source located roughly 9000 light years away in the constellation Scorpius. Scorpius X-1 was the first extrasolar X-ray source discovered, and, aside from the Sun, it is the strongest apparent source of X-rays in the sky. ...

, two astronomical x-ray sources *

M82 X-1 M82 X-1 is an ultra-luminous X-ray source located in the galaxy M82. It is a candidate intermediate-mass black hole, with the exact mass estimate varying from around 100 to 1000. One of the most luminous ULXs ever known, its luminosity exceeds th ...

, a candidate intermediate-mass black hole detected in January 2006 * United States patent X1, by

Samuel Hopkins (inventor) Samuel Hopkins (December 9, 1743 – 1818) was an American inventor from Philadelphia, Pennsylvania, On July 31, 1790, he was granted the first U.S. patent, under the new U.S. patent statute just signed into law by President Washington on April ...

* X1 (Egyptian hieroglyph t), an extremely common alphabetic letter in the Ancient Egyptian alphabet