Prohibition signs are essential for workplaces and public areas that require health and safety orders. Each sign includes a red circle and the banned activity, which works the same way as the design of road signs (circle for order and triangle for warning).Various messages are available in this range, including banned by law activities, such as "No Smoking" or "No Parking". Workplace rules and health and safety situations are another option including "No Mobile Phones" and "Not Drinking Water".