XDM
Introduction '''XDM''', '''xdm''', or similar can refer to:
Computing * X display manager, a part of the X Window System architecture* XDM (display manager), the default display manager included with the X Window System* XDM (file format), the Extensible Device Metadata open format for including depth maps and other metadata in standard image files* XQuery and XPath Data Model* Cross-document messaging, that works around the limits set by the same origin policy in a web browser
Firearms * Springfield Armory XD-M, a pistol series sold in the United States by Springfield Armory, Inc.
Gaming * ''XDM: X-Treme Dungeon Mastery'', a role-playing game supplement by Tracy Hickman, Curtis Hickman and Howard Tayler.