This area contains source and executable for the LZCMP and LZDCM
utilities used in several places on the tape to compress large
files to gain room. The sources contain documentation in comments
at the start of the code for those curious about the programs'
operation.
	To use LZCMP and LZDCM, define them as DCL foreign
symbols. For instance, you might use commands like

$LZCMP:==$DECUS$DISK:[VAX86D.LZW]LZCMP
$LZDCM:==$DECUS$DISK:[VAX86D.LZW]LZDCM

Then to compress a file use a command like

$ LZCMP -v inputfile.typ squeezedfile.typ

or to decompress the file use a command like

$ LZDCM squeezedfile.typ unsqueezedfile.typ

If you use those commands, "inputfile.typ" and "unsqueezedfile.typ"
will be copies of each other.

	Note that you'd have to define "DECUS$DISK" before giving the
$ lzcmp:==...
etc. definitions above... the idea is to run the programs as foreign
commands. The -v switch for LZCMP is the "verbose" switch so that
when LZCMP is done it'll report to you what it did. The default
operation on VMS preserves file attributes in the squeezed file.
Several "compatibility" options (not used on the tapes) treat the
files in one of two stream modes (text and binary) and can be used
for transporting files to/from non-VMS systems.
	It is presumed that if you're able to read the tape in VMS
BACKUP, you must have a VMS system handy to do the decompress on, and
that in that case, preserving all the file attributes is desirable.

	USAGE NOTE FOR THE VAX SIG TAPES

	Wherever any file has a type of form  .?Z?,  where ? is any
character, it is compressed by LZCMP here and should be decompressed
with LZDCM before use. In all cases, where this has been done, either
there is a command file which will decompress all compressed files
in its directory (after editing to define LZDCM as a symbol to run
LZDCM.EXE on your system), OR the file squeezed is a VMS Backup
saveset, so LZDCM needs to be run on only one file, and Backup can then
break it up to individual files and directories.

	The above is by Glenn Everhart.  I (Joe Bingham) have used different
conventions.  When compressing a single file I have appended _LZC to the
file extension.  Thus COMMON_WORDS.DAT becomes COMMON_WORDS.DAT_LZC.  When
compressing a directory or a directory tree I have first used VMS BACKUP
to package all of the files in a single file.  I have then compressed that
file and used the name THIS_DIR.LZS or THIS_TREE.LZS.  In such cases I have
also included a THIS_DIR or THIS_TREE.FILES so you do not have to reverse
the procedure just to see what files are there.  I hope this does not cause
too much confusion.