Much of this code was developed at SAO by the HEAD Software R&D group,
with the significant help of collaborators and beta test users around
the world. We especially would like to acknowledge help from the
following DS9 collaborators:

	De Clarke         (UCO/Lick)
	Maureen Conroy    (SAO)
	Uwe Lammers       (ESA)
	Steve Murray      (SAO)
	Frank Primini     (SAO)
	John Roll         (SAO)
	Peter Teuben      (University of Maryland)

and code contributions from:

	Doug Mink (SAO)			wcssubs
	Mark Calabretta (ATNF)		wcslib
	D.S. Berry (Starlink)  		AST
	R.F. Warren-Smith (Starlink)	AST
	P.T. Wallace (Starlink)		SLA
	Doug Tody (NOAO)		iis,zscale
	Mike Fitzpatrick (NOAO)		iis
	Peter Wilson (HEASARC)		contour
	L. Brown (HEASARC)		contour
	Jean-loup Gailly		zlib
	Mark Adlel			zlib
	D. Richard Hip			tkhtml,mktclapp
	G. Howlett (Lucent)		BLT
	John Ousterhout (et al.)	Tcl/Tk

Work on these projects was performed at SAO/HEAD under a grant from
NASA's Applied Information System Research Program (NAG5-9484), with
significant support from the Chandra High Resolution Camera (NAS8-38248),
the Chandra X-ray Science Center (NAS8-39073), and the Chandra Telescope
Scientist (NAG8-1607).
