The Inter-Client Communication Conventions Manual is one of the
official X Consortium standards documents that define the X environment. It
describes the conventions that clients must observe to coexist peacefully
with other clients sharing the same server.  If you are writing X clients,
you need to read and understand the ICCCM, in particular the sections
discussing the selection mechanism and the interaction between your client
and the window manager.

	Alternate definition: the ICCCM is generally the M in "RTFM" and is
the most-important of the least-read X documents.

Get the ICCCM from these sources:

	- Version 2.0 of the ICCCM is an X Consortium standard as of R6.  See
xc/doc/specs/ICCCM in the R6 distribution.

Older versions include: 

	- as part of the R5 and R4 distribution 
	- in the later editions of the Scheifler/Gettys "X Window System" book 
	- as an appendix in the new version of O'Reilly's Volume 0, "X
Protocol Reference Manual." A version in old copies of ORA Volume 1 is
obsolete.  The version in the Digital Press book is much more readable,
thanks to the efforts of Digital Press's editors to improve the English and
the presentation.  [from David Rosenthal, 10/90]