X1
Appearance
X1 or X-1 may refer to:
- Vehicles
- Bell X-1, the first aircraft to exceed the speed of sound in controlled level flight
- BMW X1, a BMW Compact Sports Activity Vehicle
- HM Submarine X1, a Royal Navy submarine
- Red Bull X1, the former name of the Red Bull X2010, a fictional car created for the game Gran Turismo 5
- SL X1, a former Swedish commuter train
- Sinclair X-1, an electrically assisted faired recumbent bicycle
- Wrightspeed X1, an electric sports car based on the Ariel Atom chassis
- X-1 Submarine, the United States Navy's only midget submarine
- Yamaha X-1 and X-1R, related Yamaha underbone motorcycles
- Computing
- a one-lane PCI Express slot
- Cray X1, a supercomputer sold since 2003
- Electrologica X1, an early Dutch computer
- Sharp X1, a series of personal computers
- X1 Professional Client, an enterprise desktop search product made by X1 Technologies, Inc.
- X1 Technologies, Inc., a software company
- Other
- X Minus One, an old time radio show
- x −1, the multiplicative inverse of x (another way to denote 1⁄x, one divided by x)
- Cygnus X-1 and Scorpius X-1, two astronomical x-ray sources
- M82 X-1, a candidate intermediate-mass black hole detected in January 2006
- Sony Ericsson XPERIA X1, a mobile phone
- First Eastern Counties route X1, a bus route from Lowestoft to Peterborough in Eastern England
- United States patent X1, by Samuel Hopkins (inventor)