1. ISO 3864 (1984) Safety colours and safety signs
2. ISO 3864-1 (2002) Graphical symbols — safety colours and safety signs — Part 1: design principles for safety signs in workplaces and public areas
3. ISO 7010 — Graphical symbols — safety signs in workplaces and public areas
4. ISO 7001 — Public information symbols
5. ISO 9186 (2001) Graphical symbols — test methods for judgement of comprehensibility and for comprehension