Assertion: mouse's button | /r/HasProperty | standardized in use
Facets:
value: for versions of windows
type: OTHER
value: for ms-dos
type: TRANSITIVE-OBJECT
value: through 3.1x
type: OTHER
Source sentences:
text: While historically, most PC mice provided two buttons, only the primary button was standardized in use for MS-DOS and versions of Windows through 3.1x; support and functionality for additional buttons was application specific.