Screenful One screen's worth of text or information. The number of lines will vary depending on hardware and software considerations. The link between the meanings of words, signs, and symbols and the context in which they are used. The relationship between the meanings of words, signs, or symbols. The way information is presented to learners.
Computer programs can present data visually as text and graphics and acoustically as sounds.
Server A computer or a software package that provides a specific kind of service to client software running on other computers. Task Described in terms of the goals or the desired end result of activities a user wants to achieve. Usability testing Testing a tool, system, or device see to determine how easily it can be used . Usability A multidimensional attribute that relates to the extent to which a product or service facilitates the goals of end users. User interface Totality of the communication and interaction between the user and the computer.