Caution signs may be used where attention needs to be drawn towards some hazard. These can be found in workplaces where workers and machine operators need to be notified of various hazards associated with their job. Caution signs indicate with text, and sometimes graphics in bold and large print, what the individual is to be aware of and what necessary precautions need to be taken when approaching a particular area or doing a certain task. Use Caution signs for information on Overhead / Clearance hazards, wet floors, certain PPE requirements and RF hazards. Do not use if there is a chance of death or serious injury or illness. Caution signs are generally a yellow background with black text and picto.