I remember it as "human-machine interaction" and "HMI design" or "interaction design". It was mostly about positioning interface elements, clear iconography, an

I remember it as "human-machine interaction" and "HMI design" or "interaction design". It was mostly about positioning interface elements, clear iconography, and workflows with as little surprises and opportunities for errors as possible. In industrial design, esp. for SCADA, it is often still called HMI.