FreeDOS is an open source operating system aiming to create an MS-DOS compatible environment. FreeDOS was originally created on 1994-05-29, as PD-DOS. After 2 months, it changed its name to Free-DOS, then the hyphen was removed in 1996-01. It has been in active development since it was created. Dell and HP have sold computers with FreeDOS on them. With the introduction of FreeDOS 1.3 RC2, live CD/live booting has been implemented.
Windows 95 or above will not run on FreeDOS without special commands, and 3.1 or below will only run in standard mode.