is archived and no longer updated

External links may not function and information on the site may be out of date. Visit for current information.


  • URL
    URL is an abbreviation for Uniform Resource Locator. Every Web page has a URL that is used to identify the page and the server on which the page resides.
  • Usability
    How effectively, efficiently and satisfactorily a user can interact with a user interface.
  • Usability evaluation or assessment
    A variety of techniques for measuring usability.
  • Usability lab
    A space designated for conducting usability tests by observing user interactions with a system and recording their activities. Additional observers may be present or may observe via two- way mirrors or video streaming in another room.
  • Usability testing
    Usability testing includes a range of test and evaluation methods such as automated evaluations, inspection evaluations, operational evaluations and human performance testing. In a typical performance test, users perform a variety of tasks with a prototype (or an operational system) while observers note what each user does and says and performance data are recorded. One of the main purposes of usability testing is to identify issues that keep users from meeting the usability goals of a Web site.
  • Use case or User scenario
    A document describing critical tasks to be accomplished by the user, or actor, or persona which outlines the specific sequence of actions needed to achieve the goal, as well as alternative sequences.
  • Use Experience (UE, UX)
    A broad term for several disciplines that study the effect of design on the ease of use and level of satisfaction with a product, site or system.
  • User Interface (UI), or Graphical User Interface (GUI)
    What the user sees.
  • User interface structure
    The basic content organization and its navigation model.
  • User research
    The study of the user's reactions to and interactions with a system.
  • User-Centered Design (UCD)
    An approach to designing a product or service (e.g. user interface design), in which the end user is placed in the center of the process.