Linked from
The 13 pages that link to Computer mouse, each with the reason it gives.
Xerox PARCRelated: PARC incorporated the mouse into practical graphical personal-computing systems.
Input deviceBroader topic: It translates hand movement and button presses into pointer control.
Xerox AltoRelated: The mouse let Alto users point to objects and operate graphical controls.
Pointing deviceBroader topic: Its surface-tracking sensors turn hand movement into pointer movement.
Desktop computerRelated: It makes graphical desktop interfaces easier to control.