List - Format

For ShrinkIt archives, this describes the compression format used.  Possible values are described here.

For Binary II archives, this holds a guess at whether the file is stored uncompressed or "squeezed".  There is no 100% reliable way to determine if a file stored in Binary II was squeezed, so a quick examination of the file contents is used to determine the status.

For disk archives, the name of the file system is shown.  This is done to emphasize that files with the same file type may be structurally different on different file systems.  For example, DOS text files use ASCII characters with the high bit set, while ProDOS text files leave the high bit unset.

It's also useful on mixed-filesystem disks, such as ProSel "Uni-DOS" 800K disks that have a 200K DOS 3.3 filesystem embedded in an 800K ProDOS volume.