Disk Operating System (DOS)

A Disk Operating System (DOS) is a text-based user interface (TUI) that operates through a disk drive. DOS, which served as a foundational computing architecture, was widely used in the past but has been largely replaced by more advanced operating systems. DOS was typically associated with hard disk drives (HDDs), floppy disks, and optical disks, featuring a basic file system for reading, writing, and organizing files on the storage media. One well-known DOS is MS-DOS, developed by Microsoft for IBM in 1981.