Random numbers

[Russell Holton]

With lava lamps

http://www.zdnet.com/article/how-lava-lamps-are-used-to-encrypt-the-internet/

[John O'Shaughnessy [FCM]]

Way back in the late 1990's one of my colleagues at Silicon Graphics used Lava Lamps (might have been a single lamp in his case) to generate random numbers. It was written up somewhere - I can't remember where -- maybe Wired magazine?