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  .*_LZW,  where * is any
extension, it is compressed by LZCMP here and should be decompressed
with LZDCM before use. In all cases, where this has been done, there 
will be a directory (often named THIS_DIR.LIS) of the file directory
tree prior to backing up and compressing. Areas have been compressed
by creating a VMS Backup saveset and compressing the saveset, so
that only one squeezed file per directory tree need be dealt with.