Java Rings from 1998

At the JavaOne 1998 conference, Sun gave out rings like this one. It's embedded with an iButton chip containing a Java Virtual Machine. Based on the 1-Wire device communications bus system, IButtons can act as a token for access control, e-cash, data logging etc. 1-Wire systems are still in common use and someone is selling [...]

Source: http://boingboing.net/2012/03/28/java-rings-from-1998.html

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