X2 may refer to:

Computers

X2 (protocol) The Democratic Movement (, ; MoDem ) is a Centrism, centre to Centre-right politics, centre-right List of political parties in France, political party in France, whose main ideological trends are liberalism and Christian democracy, and that is ...

, a pre-V.90 standard for 56k downstream modem communications *

Athlon 64 X2 The Athlon 64 X2 is the first native dual-core desktop central processing unit (CPU) designed by Advanced Micro Devices (AMD). It was designed from scratch as native dual-core by using an already multi-CPU enabled Athlon 64, joining it with anoth ...

, the first dual-core desktop CPU manufactured by AMD * A two-lane

PCI Express PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe, is a high-speed standard used to connect hardware components inside computers. It is designed to replace older expansion bus standards such as Peripher ...

, slot * A type of

10 Gigabit Ethernet 10 Gigabit Ethernet (abbreviated 10GE, 10GbE, or 10 GigE) is a group of computer networking technologies for transmitting Ethernet frames at a rate of 10 gigabits per second. It was first defined by the IEEE 802.3ae-2002 standard. Unlik ...

, optical transceiver * X2, a transport interface used to connect enodeBs in a LTE/4G network

Vehicles and transportation

Aircraft, spacecraft and rockets

Bell X-2 The Bell X-2 (nicknamed "Starbuster") was an X-plane research aircraft built to investigate flight characteristics in the Mach 2–3 range. The X-2 was a rocket-powered, swept-wing research aircraft developed jointly in 1945 by Bell Aircraft Co ...

, an experimental supersonic aircraft * Mitsubishi X-2 Shinshin, a Japanese experimental stealth fighter (formerly known as ATD-X) * Orba, also known as ''X-2'', a planned British satellite *

Sikorsky X2 The Sikorsky X2 is an experimental high-speed compound helicopter with coaxial rotors, developed by Sikorsky Aircraft, that made its first flight in 2008 and was officially retired in 2011. Design and development Sikorsky developed the X2 heli ...

, a prototype, coaxial high-speed helicopter *

Skycycle X-2 The Skycycle X-2 was a steam rocket, steam-powered rocket owned by Evel Knievel and flown during his Snake River Canyon (Idaho), Snake River Canyon jump in Idaho in 1974. An earlier prototype was designed, named the Skycycle X-1, by Douglas Malew ...

, a rocket used by Evel Knievel *

Skydio X2 The Skydio X2 is an American teleoperated compact quadcopter Unmanned aerial vehicle, drone produced by Skydio. Introduced in July 2020, he X2 is intended for both military and civilian use and has also been produced in India by AeroArc. Design ...

, an quadcopter camera drone *

SpaceShipOne flight 17P Flight 17P of SpaceShipOne was a spaceflight in the Scaled Composites Tier One, Tier One program that took place on October 4, 2004. It was the second competitive flight in the Ansari X Prize competition to demonstrate a non-governmental reusabl ...

, also known as X2, the second Ansari X Prize flight * X-2 Dragonfly, the company designation of the Rotor-Craft XR-11 experimental helicopter of the late 1940s * X-2 Rocket, the spacecraft used in Mission: Space in Epcot Center, Orlando, Florida

Watercraft

* Bathyscaphe ''Trieste II'', also known as ''X-2'', the US Navy bathyscaphe based on the ''Trieste'' * HMS ''X2'', a Royal Navy submarine * Kawasaki X2, a personal water craft

Other vehicles and transportation

BMW X2 The BMW X2 is a subcompact luxury crossover SUV produced by BMW since 2017. It is marketed as a sports activity coupé (SAC), it is considered a sportier and less practical alternative to the X1, as is the case with other even-numbered X model ...

, a SUV vehicle produced by BMW *

North Wing Sport X2 The North Wing Sport X2 is an American ultralight trike, designed and produced by North Wing Design of Chelan, Washington. The aircraft is supplied as a kit for amateur construction or as a complete ready-to-fly-aircraft.Bayerl, Robby; Martin ...

, an American ultralight trike design * SJ X2, used for the

X 2000 X 2000, officially designated X2, is an electric high-speed tilting train operated by SJ in Sweden. It has a top commercial speed of 200 km/h (124 mph) and a top design speed of 210 km/h (130 mph) but has achieved a maximum speed of 276 k ...

train system in Sweden * X2 (New York City bus), a bus route *

Benning Road–H Street Line The Benning Road–H Street Line, designated Route X2, is a daily bus route operated by the Washington Metropolitan Area Transit Authority between Minnesota Avenue station, which is served by the Orange Line (Washington Metro), Orange Line of t ...

, a Metrobus route in Washington, D.C., designated X2

Video games

* ''

Dance Dance Revolution X2 (''DDR X2'') is a music video game, and a part of the ''Dance Dance Revolution'' series. The arcade version of ''DDR X2'' was revealed by Konami on November 20, 2009. The sequel to '' Dance Dance Revolution X'', X2 began public beta testing on ...

'', a 2010 music video game for the PlayStation 2 * ''

Final Fantasy X-2 is a 2003 role-playing video game developed and published by Square for the PlayStation 2. Unlike most ''Final Fantasy'' games, which use self-contained stories and characters, ''X-2'' continues the story of ''Final Fantasy X'' (2001). The s ...

'', a 2003 role-playing video game * ''

Mega Man X2 ''Mega Man X2'' (stylized as ''MEGA MAN X²''), known as in Japan, is a 1994 action-platform game developed by Capcom for the Super Nintendo Entertainment System (SNES). The game was released in Japan on December 16, 1994, and in North America ...

'', a 1994 platform game * '' X2: The Threat'', a 2003 space simulation game * ''X2'' (video game), a 1997 video game * X2, the main character in '' Star Wars Battlefront: Elite Squadron''

Film

* ''X2'' (film), a 2003 sequel to the 2000 film ''X-Men'' * '' XXX: State of the Union'', also known as ''X2'' or ''xXx²: The Next Level'', a 2005 American film

Phones

Nokia X2 Nokia X2 is a brand name used for several phones made by Nokia: * Nokia X2-00 feature phone, 2010 * Nokia X2-01 feature phone with a QWERTY keyboard, 2011 * Nokia X2-02 feature phone, 2012 * Nokia X2-05 feature phone, 2011 * Nokia X2 (2014), Androi ...

, feature phone/smartphone *

Sendo X2 The Sendo X2 (codenamed Tobi while in development) was the second Series 60 mobile phone developed by Sendo. When announced, it was the smallest and lightest Series 60 mobile in the marketplace. The Sendo X2 was the first "music mobile" announc ...

, a Series 60 mobile phone *

Sony Ericsson Xperia X2 The Xperia X2 (internal codename Vulcan), announced in September 2009, is a smartphone of the Xperia series by Sony Ericsson. It is the successor to the X1. Features include a 3.2-inch touchscreen, a sliding arc keyboard, an 8.1 MP camera ...

, smartphone

Other

* X2 (roller coaster), at Six Flags Magic Mountain *

Chi-squared distribution In probability theory and statistics, the \chi^2-distribution with k Degrees of freedom (statistics), degrees of freedom is the distribution of a sum of the squares of k Independence (probability theory), independent standard normal random vari ...

, a theoretical probability distribution in inferential statistics *

Square (algebra) In mathematics, a square is the result of multiplying a number by itself. The verb "to square" is used to denote this operation. Squaring is the same as raising to the power 2, and is denoted by a superscript 2; for instance, the square ...

, also known as the algebraic square * Keyboard sold by

Korg , founded as Keio Electronic Laboratories, is a Japanese multinational corporation that manufactures electronic musical instrument An electronic musical instrument or electrophone is a musical instrument that produces sound using electr ...

in the 1990s * X-2 Counter Espionage Branch, counterintelligence branch of the Office of Strategic Services