>On Wednesday I saw Ray Kurzweil give a short talk
>* He graphed the speed of computing devices from 1900 to present, and
> claimed that computing speed is not only increasing exponentially,
> but that the rate at which computing speed is increasing is
> increasing exponentially (the graph on a log scale curves upwards).
Probably this one:
http://www.frc.ri.cmu.edu/~hpm/book98/fig.ch3/p060.html
Damien Broderick