That quality of a system that makes it easy to learn, easy to use and encourages the user to regard the system as a positive help in getting the job done. User A person who uses a system to perform a business function.
In many circumstances in computer systems there may be alternate ways a user can influence the
behavior of a utility, user interface, or other system process. Typically set by adjusting values in a set of user preferences; for example, in a program generator, preferences may be set for style, performance, user interface behavior and code standards.
A meeting at which some of the facilities of a system are demonstrated to and reviewed by the user. The objective of a user review is to elicit feedback on which to base future development and improvement of the facilities being reviewed.
A program or system facility that performs a useful job for the users. It does not require the user to provide any interaction other than perhaps initially requesting the utility.