A sign can have a multitude of uses; it may advise of factors of interest such as zoos or parks, they could highlight rate limits and attracted attention to potential dangers. There are many unique kinds of safety signs and these are extremely different from the safety signs standard everyday ones like those mentioned previously.

Another hint like this is that the high voltage one that is also yellow and has a black zigzagging arrow in it.

In some cases you will find internationally recognized criteria or designs such as the one which denotes radiation. This always has a yellow background with three blades around a centre circle and may look as the propeller blades of a plane.

A security sign however tends to stay relatively standard although they can have minor and or subtle variations in their layouts depending on the country of their origin. It follows that foreign visitors are more likely to understand them. The sign can notify of a possible danger of a substance that could be toxic or corrosive effect in case it comes in contact with skin.

A warning sign and a security sign are two very different things. The first will be advising of a possible hazard while the next will advise of an actions precaution needed prior to using or working in a specific location. Regardless of which one you come across you should pay close attention and follow all directions to prevent any harm to yourself or others.

Most of the warning signs and symbols public signs follow some level of standard design, the signal form or background color may vary or the actual symbol may differ somewhat but they'll mean the identical thing. If you are seeing another country and think you may encounter such a sign be sure to research their meaning beforehand.