Assertion: operating system | /r/HasProperty | dos
Facets:
value: for pcs
type: OTHER
Source sentences:
text: The first OS built by Microsoft was DOS.
text: For PCs, the most popular operating systems are DOS, OS/2, and Windows, but others are available, such as Linux.
text: In the early days of personal computers, the operating system was known as DOS (Disk Operating System) and variants.