Second Life uses GUIDs for identification of all assets in its world.
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When printing fewer characters is desired, GUIDs are sometimes encoded into a base64 or Ascii85 string.
location identifier | Q-Unique | Unique Population Registry Code | Object identifier | globally unique identifier | Wade "Unique" Adams | Universally Unique Identifier | Unique Selling Proposition | Unique identifier | "unique identifier" | Uniform resource identifier | Portable Unique IDentifier | Locator/Identifier Separation Protocol | France's unique and colorful past | Drama Desk Award for Unique Theatrical Experience | Dominique Young Unique | Book Item and Component Identifier | ''Black Knight Sword'' features a unique Kamishibai |
UUIDs were originally used in the Apollo Network Computing System and later in the Open Software Foundation's (OSF) Distributed Computing Environment (DCE), and then in Microsoft Windows platforms as globally unique identifiers (GUIDs).