X Resources: Window System, Parameter, Computer Program, Button (Computing), Background Color

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

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

X11 Color Names: Computing, X Window System, RGB, Value, Name

Xpenguins: X Window System, Computer Program, Penguin, Microsoft Windows, Tux, Root