LOG OF SIGNIFICANT CHANGES

Release	Sections Changed	Brief Notes
Date
1993 Dec 29		Last Major update
1994 Nov 30	All	Made compatible with LaTeX2HTML software
1998 Dec 2	All	Removed inconsistencies with OGIP/92-007
2001 Mar 19	All	Allowed 4-byte integer CHANNEL number and
		AREASCAL and BACKSCAL as vectors
2004 Apr 12	All	Allowed 2-byte COUNTS