علائم اخطار

image	name	unicode
	skull and crossbones	U+2620
caution sign	caution sign	U+2621
	radioactive sign	U+2622
	Radiowaves hazard sign
	biohazard sign	U+2623
	warning sign	U+26A0
	high voltage sign	U+26A1

http://en.wikipedia.org/wiki/Image:Radioactive.svg

http://en.wikipedia.org/wiki/Image:Skull_and_crossbones.svg

http://en.wikipedia.org/wiki/Image:Radio_waves_hazard_symbol.svg

http://en.wikipedia.org/wiki/Image:Biohazard_symbol.svg

http://en.wikipedia.org/wiki/Image:Achtung.svg

http://en.wikipedia.org/wiki/Image:High_voltage_warning.svg

منبع