X2

X2 may refer to:

Computers[edit]

Bathyscaphe Trieste II, also known as X-2, the US Navy bathyscaphe based on the Trieste
Bell X-2, an experimental supersonic aircraft
BMW X2, a SUV vehicle produced by BMW
HMS X2, a Royal Navy submarine
Kawasaki X2, a personal water craft
Mitsubishi X-2 Shinshin, 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, a prototype, coaxial high-speed helicopter
SJ X2, used for the X 2000 train system in Sweden
Skycycle X-2, a rocket used by Evel Knievel
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
X2 (New York City bus)
X2, a Metrobus route, in Washington, D.C.
X-2 Rocket, the spacecraft used in Mission: Space in Epcot Center, Orlando, Florida

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

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
Nokia X2, feature phone/smartphone
Sendo X2, a Series 60 mobile phone
Sony Ericsson Xperia X2, smartphone
Keyboard sold by Korg in the 1990s
X-2 Counter Espionage Branch, counterintelligence branch of the Office of Strategic Services