DR DOS 6. Operating system for Personal Computers DR DOS 6.0 Operating system for Personal Computers - 1 - 1991 - 666 - 0 . ISBN: 1182-2004-001 6200 Source: Бэлэг дурсгалын журмаар авсан Subjects--Index Terms: DR DOS 6.0 Dewey Class. No.: 005 / D80