From wiki.freedos.org...
FreeDOS is a complete, free, DOS-compatible operating system. While we provide some utilities, you should be able to run any program intended for MS-DOS. Pretty much any program that works on MS-DOS will work on FreeDOS. You can also use FreeDOS on a network! However, you may experience problems running Windows on FreeDOS. For example, Windows standard-mode works on FreeDOS, but '386-mode Windows for Workgroups 3.11 does not.