X1

X1 or X-one may refer to:

Automobiles

 * BMW X1, a 2009–present German subcompact luxury SUV
 * Geely Yuanjing X1, a 2017–2021 Chinese mini crossover
 * Red Bull X1, the former name of the Red Bull X2010, a fictional car created for the game Gran Turismo 5
 * Wrightspeed X1, 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), a bus route in New York City, New York, United States
 * X1 Steel Link, 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

Rail transport

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

Watercraft

 * X1 (dinghy), a fast, light-weight sailing dinghy designed for inland racing
 * HM Submarine X1, a Royal Navy submarine

Technology

 * Sharp X1, a Japanese home computer manufactured by the Sharp Corporation
 * Xbox One, a video game console
 * a one-lane PCI Express slot
 * Cray X1, a supercomputer sold since 2003
 * Electrologica X1, an early Dutch computer
 * Sony Ericsson XPERIA X1, a mobile phone
 * ThinkPad X1 Carbon, a high-end notebook computer released by Lenovo in 2012
 * X1 (software company) formerly known as X1 Technologies, Inc.
 * Tegra X1, a system on a chip released by Nvidia in 2015
 * X1, an IPTV-based cable television hardware platform developed by Comcast

Arts, entertainment, and media

 * X1 (band), a South Korean boy band formed through Produce X 101
 * X1 (rapper) (1979–2007), American rapper
 * X Minus One, a 1950s American radio show
 * X-Men (film), the first film in the X-Men franchise
 * X-One, monthly magazine produced by Imagine Publishing

Other

 * x−1, the multiplicative inverse of x (another way to denote 1⁄x, one divided by x)
 * United States patent X1, by Samuel Hopkins (inventor)
 * X1 (Egyptian hieroglyph t), an extremely common alphabetic letter in the Ancient Egyptian alphabet
 * X1, a former sister MMA promotion of the defunct Fighting of World Japan Pro Wrestling