I attended the 1991 Mathematica Conference in San Francisco, and was converted on the spot when Stephen Wolfram played the bifurcation function with Mathematica—audio from mathematics on a computer! Then I heard a talk by Joe Stampfli on using Mathematica to study Kanerva’s sparse distributed memory neural networks, which I’d been studying with APL. From that point on, through many Mathematica conferences, editorial work, and teaching, Mathematica has been my essential cognitive tool.