X2

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X2 may refer to:

Mathematics

• Square (algebra), also known as the "algebraic square", a concept in algebra
• Chi-square distribution, a theoretical probability distribution widely used in inferential statistics

Films

• X2, a 2003 American movie also known as X-Men United
• XXX: State of the Union, also known as X2 or XXX², a 2005 American film

Video games

• X2, a video game
• Final Fantasy X-2, a role-playing video game
• Megaman X2, a platform game
• X²: The Threat, a space simulation game

Transportation craft

• Bell X-2, an experimental supersonic aircraft
• Sikorsky X2, a prototype, coaxial high-speed helicopter
• SpaceShipOne flight 17P, also known as "X2", the second Ansari X Prize flight
• Skycycle X-2, a rocket used by Evel Knievel
• HM Submarine X2, a Royal Navy submarine.
• Bathyscaphe Trieste II, also known as X-2, the US Navy bathyscaphe based on the Trieste
• X2 train, used for the X2000 train system in Sweden
• X2 (PWC), a personal water craft

Computer related

• 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 10 Gigabit Ethernet optical transceiver

Other

• X² (roller coaster), a Roller Coaster at Six Flags Magic Mountain
• Sendo X2, a Series 60 mobile phone
• The counterintelligence branch of the Office of Strategic Services, an American agency during World War II
• X-2 is the name of the fictional space shuttle series in the Epcot attraction, Mission: Space
• X-2 is the name of the Hydrofoil owned by the Venture family on the Venture Bros.

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.