XOS

XOS or Xos may refer to:
 * XOS (operating system), an Android-based operating system
 * XOS 3.0, 4.0, and 5.0, Red Hat Enterprise Linux derivatives
 * XOS valuation, a kind of utility function used mainly in mechanism design
 * Xbox One S, a video game console by Microsoft
 * Xerox Operating System, an operating system for the XDS Sigma line of computers
 * Xylooligosaccharide, a polymer of the sugar xylose
 * Xos, Inc., an American manufacturer of electric trucks
 * XOS Romania a privately held Romanian company operating a classified advertisements website with sections devoted to jobs, housing, for sale, items wanted, services, community service.