When Douglas Engelbart and Bill English (within Stanford Research Institute) invented the first pointing system in the early 60s, the X-Y location indicator (with relation, of course, to the X & Y axis) had been named.
It was first used with the Xerox Alto computer and demonstrated by Engelbart in 1968 (check it out on YouTube) in what is considered the ‘The Mother of All Demos’. In 1968, Engelbart used a ‘mouse’ to illustrate word processing, graphics, windows, file linking, and power, all of which found their way into modern computers.
Engelbart was also responsible for the word mouse, invented simply because he was reminded of a rodent’s tail by the cable sticking out from the end of the unit.