Assertion: mouse | /r/HasProperty | offered as alternative input device
Facets:
value: since 1968
type: TEMPORAL
value: to trackballs
type: PURPOSE
Source sentences:
text: Somewhat later, the idea of "reversing" this device led to the introduction of the first computer ball mouse (still named Rollkugel, model RKS 100-86), which was offered as an alternative input device to light pens and trackballs for Telefunken's computer systems since 1968.