This comment reminded me of an internal talk I attended at Bell Labs. It had the single most powerful slide I've ever seen in a talk. It was a talk about internal networking, and the slide looked like your standard network diagram -- lots of circles with lots of lines connecting them. The computation centers were networked. UUCP was on there, and datakit.
But dead in the middle of the slide was a circle that had absolutely no connections with anything. Of course, somebody asked about, and was told "Oh. That's the networking department..."
As I recall, said department ceased to exist about a month later...