Hazard
Many hazard warnings exist: flammable, corrosive, toxic, radioactive, explosive, etc.
The 'p' is an abbreviation of pence.
y shall i noe :P
Yellow is a water hazard. Red is a lateral hazard. White is out of bounds. The rules indicate how each of these should be dealt with.
The P stands for Park. The Hand Brake is the brake you use while parked, hence why there is a P on it.
One would indicate an emergency eyewash. Another would indicate a corrosion hazard. And another would indicate the position of fire extinguishers, or of the First Aid.
The flags SU and P indicate Switched up and bundled in port channel respectively in the Ethernet Summary.
Blue stakes on a golf course indicate "ground under repair". They may be blue with a green top which would indicate that an appropriate government agency has declared the area an "environmentally-sensitive area" and the local golf committee has declared it ground under repair to prevent play from it.
A P E XA quantity that does not indicate direction.
A vertical open-faced diamond symbol is used to indicate a hazard such as a rock.
The most common hazard signs that are uniform across most countries in the world is a warning to indicate what the maximum speed is. This varies on the different type of road as well as its surroundings.