Gives the result of a study of some of the graphical symbols for use on equipment standardized in IEC 60417 being primarily intended to: - identify the equipment or a part of the equipment (e.g. a control or display); - indicate a functional state (e.g. on, off, alarm); - designate connections (e.g. terminals, filling points for materials); - provide information on packaging (e.g. identification of contents, instructions for handling); - provide instruction for the operation of the equipment (e.g. limitations of use).