A. Disk Operating System - डिस्क ऑपरेटिंग सिस्टम
B. Disk operating session - डिस्क ऑपरेटिंग सेशन
C. Digital Operating System - डिजिटल ऑपरेटिंग सिस्टम
D. Digital Open system - डिजिटल ओपन सिस्टम
A disk operating system is a computer operating system that can use a disk storage device, such as a floppy disk, hard disk drive, or optical disc. A disk operating system must provide a file system for organizing, reading, and writing files on the storage disk