MS-DOS installation compression
From Just Solve the File Format Problem
Revision as of 17:48, 23 April 2013 by Dan Tobias (Talk | contribs)
The MS-DOS installation compression system is used for system installation files when installing or upgrading MS-DOS starting with version 5.0a. It replaces the last character of the file extension with an underscore. The EXPAND command decompresses the files, and is run as part of the installer. Apparently the Google Chrome installation process also needs it.
This format apparently uses some form of Lempel-Ziv compression.
