Assertion: keyboard | /r/HasProperty | flip-down feet
Facets:
value: to change the typing angle
type: PURPOSE
value: to change a design change
type: PURPOSE
Source sentences:
text: Introduced and sold with the Macintosh Classic and LC in 1990, this keyboard was almost identical to the original ADB Keyboard, but included flip-down feet to change the typing angle and a design change that gave the frame and keys a more streamlined appearance.