MS-DOS 6.22 is an RTM build of MS-DOS 6.x. This build was generally available on 1994-06. MS-DOS 6.22 shipped with "Enhanced Tools", including a disk compression tool known as DriveSpace. It is the last version of MS-DOS known to support the 8088, 8086, and 286 CPUs. An included supplemental disk also ships with copies of tools dropped from the previous version of MS-DOS. A basic graphical interface known as the MS-DOS Shell is also available.