The idea should mean that anyone with an Open ID identifier can use it to log in to, and use, any and every other site that has signed up to the scheme.

BBC: Typewriter,

This ICC-ID is a unique identifier to the cellular network that is used by the carrier to route calls to your cellphone.

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The trials are for those running websites to see how Microsoft is working with the Open ID standards, and how to go about accepting that version as a login identifier.

BBC: Typewriter,