This document discusses the Java Ring, which is a stainless steel ring containing a microprocessor with 134KB of RAM and 32KB of ROM. It houses a Java Virtual Machine (JVM) and can be preloaded with applets. The ring was introduced in 1998 and uses an iButton component, which is a single-chip microcomputer. Potential applications of the Java Ring include providing security, personalized services, and starting a car with customized settings. In conclusion, the document notes the Java Ring is highly durable and secure.