x-default is the hreflang value that names the fallback URL search engines show users whose language or region matches no listed page…
X-height in typography is the height of lowercase letters without ascenders or descenders, a key factor in how large and legible a…
X.509 is the standard format for public key certificates that bind an identity to a key, forming the basis of TLS and…
X11 is the network-transparent windowing protocol behind the X Window System, which has drawn graphical desktops on Unix and Linux since 1987.
x86-64 is the 64-bit extension of the x86 instruction set architecture that runs most desktop, laptop and server processors in use today.
Xbox Cloud Gaming is the Microsoft game streaming service that runs Xbox games on data center servers and streams them to phones,…
Xbox Series X is Microsoft's high-end ninth-generation game console, released in 2020 and built for 4K gaming with an AMD processor and…
Xcode is Apple's integrated development environment for macOS, used to write, build, test, debug and ship apps for iPhone, iPad, Mac and…
XFS is a high-performance 64-bit journaling Linux filesystem built for large files, parallel I/O and big volumes, and the default in many…
XLR is the locking circular connector used in audio recording to carry balanced microphone and line signals with low noise over long…
XLSX is the default spreadsheet file format of modern office applications, a ZIP package of XML parts defined by the Office Open…
XML is a text-based markup format that represents hierarchical data with nested, self-describing tags and supports strict validation through schemas.
XNU is the hybrid kernel of macOS and other Apple operating systems, combining the Mach microkernel, a BSD layer and the I/O…
XR, or extended reality, is the umbrella term for virtual, augmented and mixed reality, which blend digital content with the physical world…
XSS, or cross-site scripting, is an application security flaw that lets attackers run their own script in a victim's browser within a…