X
- X
- x plot
- X terminal
- X Window System
- X-10
- x-axis
- x-height
- X-ray crystallography
- X-ray detector
- X-ray imaging
- X-ray optics
- X-ray radiation
- X-ray radiation
- X-ray source
- X-RAY test
- X-ray unit
- X-SAMPA
- x-y coordinate
- X-Y plotter
- X.121
- X.25
- X.39
- X.400
- X.435
- X.500
- X.509
- X.509 certificate
- X.800
- X/Open
- X10 module
- X10 network
- X10 signal
- X11 license
- X3D
- x86
- x86-based computer
- x86-based server
- XA
- XaaS
- XAUI
- Xavier initialization
- Xbase
- XCCDF
- XCVR
- XD bit
- xD Picture Card
- XDP
- XDR
- xDSL
- XE