NEW DOS 5.0 Vintage Collectible Digital Research 3.5" Disk DR DOS 5 Rare 1991-92
Which was an advanced successor of CPM. This DOS is on 3.5" Floppy Diskettes (2). DR DOS 5.0. Digital Research made DOS from 1976 to the late 90's. Digital Research. Manufactured around 1991 for IBM compatible, labeled for KLH computers.