SCO compress LZH

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'''SCO compress LZH''' refers to a compressed file format that can be created by the SCO Unix version of the <code>compress</code> utility, as an alternative to the [[compress (Unix)|standard compress format]]. The LZH format usually has a better compression ratio. The <code>-H</code> option must be used to create such files.
 
'''SCO compress LZH''' refers to a compressed file format that can be created by the SCO Unix version of the <code>compress</code> utility, as an alternative to the [[compress (Unix)|standard compress format]]. The LZH format usually has a better compression ratio. The <code>-H</code> option must be used to create such files.
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The man page says "Portions of this code used for Lempel-Ziv-Huffman encoding were based on Rahul Dhesi's [[Zoo]] archiver which was adapted from Haruhiko Okumura's [[Ar (Haruhiko Okumura)|ar archiver]]".
  
 
== Identification ==
 
== Identification ==
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== Software ==
 
== Software ==
 
* [https://www.gnu.org/software/gzip/ GNU gzip] can decompress the format.
 
* [https://www.gnu.org/software/gzip/ GNU gzip] can decompress the format.
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* {{Deark}}
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== Sample files ==
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* https://telparia.com/fileFormatSamples/archive/scoCompress/
  
 
== Links ==
 
== Links ==
 
* [http://osr600doc.sco.com/en/man/html.C/compress.C.html SCO compress man page]
 
* [http://osr600doc.sco.com/en/man/html.C/compress.C.html SCO compress man page]
 
== Editors' notes ==
 
 
The man page says "Portions of this code used for Lempel-Ziv-Huffman encoding were based on Rahul Dhesi's [[Zoo]] archiver which was adapted from Haruhiko Okumura's ar archiver".
 
 
Gzip says "The code in this file is directly derived from the public domain 'ar002' written by Haruhiko Okumura."
 
 
Note that Haruhiko Okumura was also involved in the development of [[LHArc]].
 
 
Possibly-relevant software:
 
* [https://oku.edu.mie-u.ac.jp/~okumura/compression/ar002/ ar002]
 
* https://github.com/WWelna/lzh-improved
 
  
 
[[Category:File formats with extension .z]]
 
[[Category:File formats with extension .z]]
 
[[Category:File formats with case sensitive extensions]]
 
[[Category:File formats with case sensitive extensions]]

Revision as of 03:18, 19 November 2022

File Format
Name SCO compress LZH
Ontology
Extension(s) .Z

SCO compress LZH refers to a compressed file format that can be created by the SCO Unix version of the compress utility, as an alternative to the standard compress format. The LZH format usually has a better compression ratio. The -H option must be used to create such files.

The man page says "Portions of this code used for Lempel-Ziv-Huffman encoding were based on Rahul Dhesi's Zoo archiver which was adapted from Haruhiko Okumura's ar archiver".

Contents

Identification

Files begin with signature bytes 1f a0.

Compare to compress (Unix)#Identification.

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