MS DOS Compression Format (KWAJ Variant)

Summary

Name

MS DOS Compression Format (KWAJ Variant)

Identifiers

PUID: fmt/469

Description

The MS-DOS compression format uses the LZSS 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.

Note

A DOS compressed file will be named file.**_, so a .exe will look like file.ex_, a DOS compressed .jpg will look like file.jp_ etc. https://www.cabextract.org.uk/libmspack/doc/szdd_kwaj_format.html

Submitted by

Digital Preservation Department / The National Archives

Internal signatures

Changelog

• V103

  Release date

  11 March 2022

  • Updated

    MS-DOS Compression Format (KWAJ Variant): Amended name for consistency, added link. Submitted by IS4.

• V65

  Release date

  25 October 2012

  • Added format

    MS DOS Compression format (KWAJ): Outline Entry Added.

  • Added signature

    MS DOS Compression format (KWAJ): Signature developed through PRONOM Research.