DR DOS 3.31

This version of DR-DOS was released on 28 May 1988 to the market. This version offered features similarly to the MS-DOS 3.31 Compaq OEM. It reported itself as PC-DOS 3.31, while the internal Basic Disk Operating System, or BDOS, kernel's version was reported as Version 6.0. This is as it reflects the derivative of Concurrent DOS 6.0, where the project originated from.