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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. Learn about the different types of UIDs, such as serial numbers, random numbers, hash functions, and UUIDs, and see examples from various domains.
A UUID is a 128-bit label used for information in computer systems. Learn about the history, standards, formats and examples of UUIDs, including the legacy Apollo NCS UUID and the OSF DCE UUID.
A serial number is a unique identifier used to distinguish individual items, such as products, documents, or aircraft. Learn about the different types, uses, and formats of serial numbers, as well as the term's origin and history.
Item Unique Identification (IUID) is a permanent marking method used to give equipment a unique ID for the US Department of Defense. It is a 2D Data Matrix symbol that contains a unique data string and is applied to tangible items or assets with an acquisition cost of over $5,000.
A national identification number is a unique identifier used by many countries for various purposes. Learn how different countries assign, use, and validate their national identification numbers.
An organizationally unique identifier (OUI) is a 24-bit number that identifies a vendor, manufacturer, or other organization. Learn about the representation, format, and usage of OUIs in MAC addresses, protocol identifiers, and other applications.
IMEI number is a unique identifier for mobile phones and some satellite phones. It can be used to block stolen phones, track devices, or access regulatory information. Learn how IMEI number works, how to find it, and how it differs from IMSI number.
How many times do companies use your Social Security number as the unique identifier for you? Your doctor, bank, employer, all depend on the number for billing and recording transactions. A ...