A unique identifier (UID) is a numeric or alphanumeric string that is associated with a single entity within a given system. UIDs make it possible to address that entity, so that it can be accessed and interacted with.
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
Here are a few examples of UIDs:
- A Uniform Resource Identifier (URI) is a unique identifier that makes content addressable on the Internet by uniquely targeting items, such as text, video, images and applications.
- A Uniform Resource Locator (URL) is a particular type of URI that targets Web pages so that when a browser requests them, they can be found and served to users.
- A Universal Unique Identifier (UUID) is a 128-bit number used to uniquely identify some object or entity on the Internet.
- A global unique identifier (GUID) is a number that Microsoft programming generates to create a unique identity for an entity such as a Word document.
- A bank identifier code (BIC) is a unique identifier for a specific financial institution.
- A unique device identifier (UDID) is a 40-character string assigned to certain Apple devices including the iPhone, iPad, and iPod Touch.
- An service set identifier (SSID) is a sequence of characters that uniquely names a wireless local area network (WLAN).
- A national provider identifier (NPI) is a unique ten-digit identification number required by HIPAA for all health care providers in the United States.