X2 may refer to:

Computers

X2 (protocol) A modulator-demodulator or modem is a computer hardware device that converts data from a digital format into a format suitable for an analog transmission medium such as telephone or radio. A modem transmits data by Modulation#Digital modulati ...

, 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 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 * A type of

10 Gigabit Ethernet 10 Gigabit Ethernet (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. Unlike previous Eth ...

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

Vehicles and transportation

* Bathyscaphe ''Trieste II'', also known as ''X-2'', the US Navy bathyscaphe based on the ''Trieste'' *

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 Cor ...

, an experimental supersonic aircraft *

BMW X2 The BMW X2 (model code F39) is a subcompact luxury crossover SUV produced by BMW. It was first showcased as the BMW Concept X2 at the 2016 Paris Motor Show, with a production version unveiled in October 2017. Sales commenced in March 2018. It i ...

, a SUV vehicle produced by BMW * HMS ''X2'', a Royal Navy submarine *

Kawasaki X2 Jet Ski is the brand name of a personal watercraft (PWC) manufactured by Kawasaki, a Japanese company. The term is often used generically to refer to any type of personal watercraft used mainly for recreation, and it is also used as a verb t ...

, a personal water craft *

Mitsubishi X-2 Shinshin The Mitsubishi X-2 Shinshin (, formerly the ATD-X) is a Japanese experimental aircraft for testing advanced stealth fighter aircraft technologies. It is being developed by the Japanese Ministry of Defense Technical Research and Development Inst ...

, a Japanese experimental stealth fighter (formerly known as ATD-X) * North Wing Sport X2, an American ultralight trike design * 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 * SJ X2, used for the

X 2000 X 2000, also called SJ X2 or simply as X2, is an electric tilting train operated by SJ in Sweden. It was constructed by Kalmar Verkstad in Kalmar, Sweden (prior to the company being bought by Adtranz in 1996) and launched in 1990 as a ...

train system in Sweden *

Skycycle X-2 The Skycycle X-2 was a steam-powered rocket owned by Evel Knievel and flown during his Snake River Canyon jump in Idaho in 1974. An earlier prototype was designed, named the Skycycle X-1, by Doug Malewicki and retired U.S. Navy engineer Robert ...

, a rocket used by Evel Knievel *

SpaceShipOne flight 17P Flight 17P of SpaceShipOne was a spaceflight in the 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 reusable crewed spacecraft, and i ...

, 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 *

X2 (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 ...

* X2, a Metrobus route, in Washington, D.C. * X-2 Rocket, the spacecraft used in Mission: Space in Epcot Center, Orlando, Florida

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 (video game company), Square for the PlayStation 2. Unlike most ''Final Fantasy'' games, which use self-contained stories and characters, ''X-2'' continues the story of ''Fin ...

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

Mega Man X2 ''Mega Man X2'' (stylized as ''MEGA MAN X²''), known as in Japan, is a video 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 and PAL regions ...

'', 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

Other

X2 (roller coaster) X2 (formerly known as X) is a steel roller coaster operating at Six Flags Magic Mountain in Valencia, California. It is the world's first 4th Dimension roller coaster and was the final roller coaster conceived and installed by ride manufacturer ...

, at Six Flags Magic Mountain *

Chi-squared distribution In probability theory and statistics, the chi-squared distribution (also chi-square or \chi^2-distribution) with k degrees of freedom is the distribution of a sum of the squares of k independent standard normal random variables. The chi-squa ...

, a theoretical probability distribution in inferential statistics *

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

, also known as the algebraic square * Nokia X2, feature phone/smartphone *

Sendo X2 Sendo was a British manufacturer and supplier of mobile phones founded in 1998 and based in Birmingham. The company went into administration in June 2005 and its technology was bought by Motorola. The company specialised in low-cost handsets aim ...

, 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, 8.1 MP camera, Wi ...

, smartphone * Keyboard sold by

Korg , founded as Keio Electronic Laboratories, is a Japanese multinational corporation that manufactures electronic musical instruments, audio processors and guitar pedals, recording equipment, and electronic tuners. Under the Vox brand name, they ...

in the 1990s *

X-2 Counter Espionage Branch The head of the Office of Strategic Services (OSS), William Donovan, created the X-2 Counter Espionage Branch in 1943 to provide liaison with and assist the British in its exploitation of the Ultra program's intelligence during World War II. A few ...

, counterintelligence branch of the Office of Strategic Services

Computers

Vehicles and transportation

Video games

Film

Other

See also