The document discusses the history and capabilities of Java Rings. Java Rings are small wearable computers in the form of rings that contain a microprocessor, memory, and Java virtual machine. They were introduced by Sun Microsystems in 1998 and can store user credentials, cash balances, and URLs. The rings use Dallas Semiconductor's iButton technology, which encases computer chips in stainless steel for durability. Information is transferred via a 1-wire communication protocol. Potential applications include secure authentication, digital signatures, and storing user profiles.
