Microsoft tried to license it, failed, and wound up licensing DoubleSpace instead. As usual, the utility being built into MS-DOS 6 pretty much destroyed competition in that space. Stacker's ace in the hole was their coprocessor card, which I coveted pretty hard..
Windows 95, 98 and ME can read DoubleSpace drives. If you get USB drives set up, which you can do with 95 and 98, and format the drive FAT, not FAT32, put the drive file on it, those versions of Windows will mount it.
