I disagree with the sentiment that nomography has lost relevance. Anybody worth their salt doing interface design for complex systems is exploiting these princi

I disagree with the sentiment that nomography has lost relevance. Anybody worth their salt doing interface design for complex systems is exploiting these principles and combining nomography and computing. For example, a power plant is littered with sensors, reading various pressures, temperatures, valve settings, etc. The traditional interfaces—a dial for every value, as per Three Mile Island—does not help a human operator in understanding the relationships in the data. Today, interfaces are designed to better explain how different parts of a system interact, and a nomograph can help an operator build a better mental model of how a change in a series of inputs affects an output. A simple calculation on a computer can produce all of the numbers defining the operating point of a turbine, but a good nomograph will convey the physical relationships of the system. I realize these types of displays aren't seen by most people on a regular basis, but they're far from irrelevant.