That’s interesting, they use the Singularity to refer to technological explosion in general rather than specifically AI becoming super intelligent. This seems to predate the AI usage.
>"Singularity is a time in the future. It'll occur when the rate of change of technology is very great--so great that the effort to keep up with the change will overwhelm us. People will face a whole new set of problems that we can't even imagine." A look of great tranquility smoothed the ridges around his eyes. "On the other hand, all our normal, day to day problems fade away. For example, you'll be immortal."