What is the relationship of DOS and MS-DOS?

DOS, or Disk Operating System, is a general term for operating systems that manage disk storage and file systems. MS-DOS, or Microsoft Disk Operating System, is a specific implementation of DOS developed by Microsoft. While DOS refers to a broader category of operating systems, MS-DOS is one of the most well-known versions, widely used in the 1980s and early 1990s for personal computers. Essentially, MS-DOS is a type of DOS, tailored for compatibility with IBM PCs and their clones.