The X Window System -- has become widely accepted by many manufacturers. X provides network transparent access to display servers, allowing local and remote client programs to access a user's display. X is used on high performance workstation displays as well as terminals, and client programs run on everything from micro to super computers. This paper describes the tradeoffs and basic design decisions made during the design of X Version 11. We presume familiarity with the paper describing X Version 10. Keywords: X Window System, interactive human-computer interface system, distributed systems. c flDigital Equipment Corporation and Silicon Graphics Computer Systems 1990. All rights reserved. -- The X Window System is a Massachusetts Institute of Technology trademark. This paper will appear in a special issue of Software Practice and Experience. y Digital Equipment Corporation, Cambridge Research Lab, One Kendall Square, Bldg. 700, Cambridge, MA 02139, U.S.A. jg@crl.dec.com z ...

This report describes research done at the Artificial Intelligence Laboratory of the Massachusetts Institute of Technology. Support for the Laboratory's artificial intelligence research is provided in part by the Advanced Research Projects agency of the Department of Defense under Office of Naval Research contract N00014-86-K-0180

this paper has already identified a number of problems with existing systems