User Acceptance Testing (UAT) is a procedure where monitored users evaluate a particular site and establish whether it meets their requirements and expectations.

The Unified Modelling Language (UML) is a general-purpose third generation modelling language for specifying, visualising, constructing and documenting the artefacts of an object-oriented software-intensive system under development.

A Uniform Resource Locator (URL), also referred to as a link or web address, is a string of text that has become a standard method of specifying the location of a specific web page or other resource on the Internet.