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A system user is a person who interacts with a system, typically through an interface, to extract some functional benefit. User-centered design, often associated with human–computer interaction, considers a wide range of generic systems. System user also defines the behaviour of the system operations and how the audience(end-user) would interact with the system using pre-designed triggers such as buttons/mouse/keyboard. In order for the system to work on a larger scale using various databases system would have to create an interface that would be suitable for specific level of knowledge that the end user acquires.〔(End-User System Development )〕 == About == Users authorized to change the way the system behaves are often called operators. Users who rely on a system, but do not operate it, are sometimes called the audience or end user. For example, when a driver (car operator) uses the horn to warn a pedestrian, then the driver is the horn operator and the pedestrian is the audience.〔(Harel (2006). Alarm Reliability, ''User Experience Magazine'', Vol 5., Issue 3 )〕 Another example of various types of users are the operators of electronic boards, such as in airports or in e-commerce, who update messages, contrasted with the audience who read the messages. Different types of system structure use different triggers. Some triggers require user to do certain action (e.g. type phone number for the system to call that person), others get triggered by certain activities related to the user (e.g. person calling user`s phone), however in both types of the system the output could be similar (e.g. phone rings). In most of the systems there are two different types of users, Single-User (e.g. car driver) type of system is only targeted at one user and others cannot interact with the system at the same time with the main user, Multi-User (e.g. university portal) is the type of system where more than one user can interact with interface simultaneously. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「User (system)」の詳細全文を読む スポンサード リンク
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