CDE: Official home site for the commercial Common Desktop Environment, at Open Group, Desktop Technologies. Links to FAQ, books, support, contacts; Motif, Open Motif, X Window.
Common Desktop Environment: CDE: Treats Common Desktop Environment for Sun Microsystem's Solaris Unix, but most information applies to CDE generally: descriptions, white papers, case studies, documents, code samples, downloads (new, prior versions), training.
Hewlett-Packard: Common Desktop Environment: Advanced User's and System Administrator's Guide: Guide to using and configuring CDE.
IBM AIX: CDE: Treats Common Desktop Environment for IBM's AIX Unix, but most information applies to CDE generally: descriptions, advantages, detailed overview, FAQ, workspaces, migration guide.
The Open Group: Bookstore and Downloads: Desktop: Motif, CDE and X11 product documentation, technical standards and studies.