The entire Internet when I first used it to access the UCLA 360/91 from an experimental terminal server (ANTS) at the University of Illinois, Urbana/Champaign. The Arpanet geeks were very happy because Arpanet had grown to the point that it took an 8.5”x11” sheet to draw the network, when a year or two earlier it could be drawn on a 5x6 index card.