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*Details: File format summary

   
 

 

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Summary

Name MS-DOS Compression Format (SZDD Variant)
Version  
Other names  
Identifiers PUID:  fmt/462
Family  
Classification Aggregate
Disclosure  
Description The MS-DOS compression format uses the SZDD algorithm to compress a single file into another single file, replacing the last character in the filename with an underscore. It is implemented via the MS-DOS commands COMPRESS.EXE and EXPAND.EXE.
Orientation  
Byte order  
Related file formats None.
Technical Environment  
Released  
Supported until  
Format Risk  
Developed by None.
Supported by None.
Source Digital Preservation Department / The National Archives
Source date 28 Aug 2012
Source description  
Last updated 28 Oct 2022
Note A DOS compressed file will be named file.**_, so a DOS compressed .exe will be named 'file'.ex_, a DOS compressed .jpg will be named 'file'.jp_. https://www.cabextract.org.uk/libmspack/doc/szdd_kwaj_format.html
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