1 LZCOMPRESS

  LZCOMPRESS  is   an  interim  package   for  the   compression   and
  decompression  of files  on  the VAX (to  make large  files  small),
  consisting of two programs :

       LZCOMP   o The compressor
       LZDCMP   o The decompressor

  LZCOMP implements the Lempel-Ziv  file compression algorithm. (Files
  are compressed by LZCOMP are decompressed by LZDCMP.) It operates by
  finding common  substrings and  replaces them  with  a variable-size
  code. This is deterministic, and can be done with a single pass over
  the file.  Thus, the decompression  procedure needs no  input table,
  but can track the way the table was built.

 Syntax

  The syntax of  the LZCOMP command is `UNIX'  rather then VAX/VMS, so
  instead  of  providing  qualifiers, you  provide  options.  This  is
  because the  program originates in the UNIX domain, and has not been
  converted to use  VAX/VMS qualifiers. Options are preceeded by a `-'
  character.

  The syntax of the LZCOMP command is :

                LZCOMP [-options] [infile [outfile]]
  LZDCMP decompresses files compressed by LZCOMP. Its usual syntax is
		LZDCMP [-options] infile outfile

 LZCOMP Options

  Options are  case insensitive  (unlike UNIX).  The following options
  are recognized :


    -B      Specifies that the input file is binary
    -Mn     Specifies maximum number of bits to be used in compression tables
    -V      Enables debugging level
    -X      Specifies compatibility mode

 Parameters

  The two parameters are the  input and output filenames respectively.
  Redirection is  supported,  however, the  output must be a disk/tape
  file.

  The  file   format   is  almost  identical   to  the   current  UNIX
  implementation of  compress (V5.0).  Files written  by UNIX compress
  should be  readable by  LZDCMP. Files written  by  LZCOMP  in export
  (-X)  format will be readable by  UNIX compress (except  that LZCOMP
  outputs two "clear" codes to mark EOF.

 LZDCMP

  LZDCMP decompresses files compressed by LZCOMP.
 Syntax
  
                LZDCMP [-options] [infile [outfile]]
 Parameters
  The two  parameters are the input  and output files.  If  you do not
  specify  an  output  file,  then  the file  is  decompressed  to the
  terminal. Which will  result in a `nasty mess' if the original input
  was a binaary file! Unless you are using `VMS private mode', in this
  case the file  is decompressed to  the original name  when an output
  file is not specified.

 Options

  Options are  case insensitive  (unlike UNIX).  The following options
  are recognized :


    -B      Specifies that the output file is binary
    -Mn     Specifies number of bits to be used in LZ compression tables
    -V      Enables debugging level
    -X3     Read a file compressed by an old UNIX compress.