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

and translations from:
       Hans-Jakob Grimm (SAO)		Deutsch
       Allan Hornstrup (DNSC)		Dansk
       Alberto Martins (Universidade de So Paulo) Portugus
       Manuel Perez Torres (SAO)     	Espaol
       Masahiro Tsujimoto (Penn. State)	Japanese

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).
