This Standard specifies requirements for visual, auditory and tactile methods of indicating safety-related information, at the man-machine interface and to exposed persons.It specifies a system of colours, safety signs, markings and other warning, intended for use for the indication of hazardous situations, and health hazards and for meeting certain emergencies. It also specifies ways of coding visual, auditory and tactile signals for indicating and actuating devices in order to facilitate the safe use and monitoring of machinery.