Contains rules for designing symbols, including their shape and size, and instructions for their application. Graphical symbols for use on equipment may be employed to identify the equipment or a part of it (e.g. a control or display), to indicate functional states (e.g. on, off, alarm), to designate connection (e.g. terminals, filling points), to provide information on packaging (e.g. identification of content, instructions for handling), to provide instruction for the operation of the equipment (e.g. warnings,limitations of use). Does not apply to graphical symbols primarily intended for use on drawings, use in technical product documentation and public information.