A user friendly system should enable the user to have reasonable control over the system. The user should always be allowed to confirm his actions to the systems. The system's operational status should always be indicated to the user. Feedback should be provided to indicate that an action by the user is completed, to inform of the system status or to advise on an incorrect entry. Feedback should always be presented in visual and acoustic mode.
Many people can benefit greatly from slightly increased transaction times.
Perception of being rushed or losing their card due to slow reaction to the prompts of the terminal puts many elderly and disabled users off from even attempting to use a public terminal. The layout of information on the screen has major consequences for its perception and comprehen-sion. Consistency and simplicity are key words for a user-friendly terminal. There are several guidelines of good design and layout of information. Visual information should be supplied by audible and vice versa.