'''X2''' may refer to:
* ''X2'' (film), a 2003 American movie also known as ''X-Men United''
* X2 (protocol), a pre-V.90 standard for 56k downstream modem communications
* X2 Turntable, a turntable manufactured by Numark
* X2 train, used for X2000 train system in Sweden
* Athlon 64 X2, the first dual-core desktop CPU manu...(continue reading)