X2

X2 may refer to:

Computers

• X2 (protocol), a pre-V.90 standard for 56k downstream modem communications
• Athlon 64 X2, the first dual-core desktop CPU manufactured by AMD
• A two-lane PCI Express, slot
• A type of optical transceiver for 10 Gigabit Ethernet
• X2, a transport interface used to connect enodeBs in a LTE/4G network

Vehicles and transportation

Aircraft, spacecraft and rockets

• Bell X-2, 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, a prototype, coaxial high-speed helicopter
• Skycycle X-2, a rocket used by Evel Knievel
• Skydio X2, an quadcopter camera drone
• SpaceShipOne flight 17P, 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, a SUV vehicle produced by BMW
• North Wing Sport X2, an American ultralight trike design
• SJ X2, used for the X 2000 train system in Sweden
• X2 (New York City bus), a bus route
• Benning Road–H Street Line, a Metrobus route in Washington, D.C., designated X2

Video games

• Dance Dance Revolution X2, a 2010 music video game for the PlayStation 2
• Final Fantasy X-2, a 2003 role-playing video game
• Mega Man X2, a 1994 platform game
• X2: The Threat, a 2003 space simulation game
• X2: Wolverine's Revenge, a 2003 action video 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, feature phone/smartphone
• Sendo X2, a Series 60 mobile phone
• Sony Ericsson Xperia X2, smartphone

Other

• X2 (roller coaster), at Six Flags Magic Mountain
• Chi-squared distribution, a theoretical probability distribution in inferential statistics
• Square (algebra), also known as the algebraic square
• Keyboard sold by Korg in the 1990s
• X-2 Counter Espionage Branch, counterintelligence branch of the Office of Strategic Services

See also

• 2X (disambiguation)