In the middle of the ARPANET map at the beginning, there's a node right in the middle called "SCOTT". I tried Googling for what this node was and didn't come up

In the middle of the ARPANET map at the beginning, there's a node right in the middle called "SCOTT". I tried Googling for what this node was and didn't come up with much. Why was the node called Scott? Was it run by a guy named Scott? Or is that an acronym for some institution? If it's a person, how and why did Scott have a PDP-11?