The name of a bunch of linked geographically distributed telex machines. Like a phone network but for text? Uh, actually, I guess what they built it something like email? And the central hub had a simulator that could help with taking decisions based on the input from that data?

They als had a very swell control room.

You might think of it as a nation-scale business intelligence system. It’s part of the case study at the end of Stafford Beer’s Brain of the Firm, an (over?)ambitious project cut short by the fall of Allende in the Chilean coup.