Vinge didn't originate the concept in 1993. It was John von Neumann, of von Neumann computer architecture fame, in 1958.

>...accelerating progress of technology and changes in the mode of human life, which gives the appearance of approaching some essential singularity in the history of the race beyond which human affairs, as we know them, could not continue.

Personally it's always bugged me that the "technological singularity" is some vague vision rather than a mathematical singularity. I suggest we redefine it at the amount of goods you can produce with one hour of human labour. When the robots can do it with zero human labour you get division by zero and a proper singularity.