Y Window System: Windowing System, Server (Computing), Library (Computer Science), Imperial College, London, Thesis

X Window Authorization: System, Computer Program, Server, Network, User (Computing)

XFixes: X Window System, Keith Packard, Computing, KDrive, X.Org Server, Computer Hardware

X Display Manager (Program Type): Window System, Login Session, Server (Computing), Computer,

library (computing): Computer science, Subroutine, Class (computer science), software, Modular programming, Executable,...