WordPerfect 5.1 for Xenix
Released in 1992 by SSI/WordPerfect Corp.
For SCO Xenix

This is WordPerfect 5.1 for Xenix. Unpack all the disks (tar -xvf
/dev/dsk/f0q18d ) from where I wanted it to live (say
/usr/wordperfect) then run the ./wpinstall installer. I don't have
the key file, so use all zero's which should give you a single user
install.

Note: These are not formatted for DOS, so WinImage can not open them. 
Use a tool like RawWrite instead.
