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  2. Universally unique identifier - Wikipedia

    en.wikipedia.org/wiki/Universally_unique_identifier

    A Universally Unique Identifier (UUID) is a 128-bit label used for information in computer systems. The term Globally Unique Identifier (GUID) is also used, mostly in Microsoft systems. [1][2] When generated according to the standard methods, UUIDs are, for practical purposes, unique. Their uniqueness does not depend on a central registration ...

  3. Unique identifier - Wikipedia

    en.wikipedia.org/wiki/Unique_identifier

    Unique identifier. A unique identifier (UID) is an identifier that is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. [1] The concept was formalized early in the development of computer science and information systems. In general, it was associated with an atomic data type.

  4. Facebook - Wikipedia

    en.wikipedia.org/wiki/Facebook

    Facebook enables users to control access to individual posts and their profile [321] through privacy settings. [322] The user's name and profile picture (if applicable) are public. Facebook's revenue depends on targeted advertising, which involves analyzing user data to decide which ads to show each user.

  5. Uniform Resource Identifier - Wikipedia

    en.wikipedia.org/wiki/Uniform_Resource_Identifier

    A Uniform Resource Identifier (URI), formerly Universal Resource Identifier, is a unique sequence of characters that identifies an abstract or physical resource, [1] such as resources on a webpage, mail address, phone number, [2] books, real-world objects such as people and places, concepts. [3] URIs are used to identify anything described ...

  6. International Mobile Equipment Identity - Wikipedia

    en.wikipedia.org/wiki/International_Mobile...

    The International Mobile Equipment Identity (IMEI) [1] is a numeric identifier, usually unique, [2][3] for 3GPP and iDEN mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone but can also be displayed on-screen on most phones by entering the MMI Supplementary Service code *#06 ...

  7. Identity documents in the United States - Wikipedia

    en.wikipedia.org/wiki/Identity_documents_in_the...

    In the United States, identity documents are typically the regional state -issued driver's license or identity card, while also the Social Security card (or just the Social Security number) and the United States passport card may serve as national identification. The United States passport itself also may serve as identification.

  8. Uniform Resource Name - Wikipedia

    en.wikipedia.org/wiki/Uniform_resource_name

    A Uniform Resource Name (URN) is a Uniform Resource Identifier (URI) that uses the urn scheme. URNs are globally unique persistent identifiers assigned within defined namespaces so they will be available for a long period of time, even after the resource which they identify ceases to exist or becomes unavailable. [1]

  9. List of national identity card policies by country - Wikipedia

    en.wikipedia.org/wiki/List_of_national_identity...

    A foundational digital ID, that focuses on a unique number (instead of a card), and this unique number, known as Fayda Identification Number is the primary identifier and essentially serves as a legal ID. The system is colloquially known as Fayda(ፋይዳ) to signify “value” in Amharic and other languages. [118]