Abstract
A sign system is not merely a collection of separate signs, each with its separate purpose; but a system with several purposes: to guide and direct; to identify; to inform and instruct; and to contribute to a consistent beauty of the environment.
The graphic designers' jobs in designing good sign systems are to understand how people read, perceive, and respond to signs. They need to know about the results of human factor psychology. Psychologists should in turn understand what graphic designers have to consider and what they do, so as to improve the communication between them.
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