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Signs
Flat
Science
Signaling, Alert, warning
Black
512x512
Interface Set
warning, signs, Alert
Computer
Computer Security
spy, Computer, malware
Science Study
danger, triangle, Alert
Nature
Picnic and bbq icons
fire, danger, Element
Industrial Icon Collection
Toxic, danger, signs
danger, traffic sign, signs
Sports
Science Elements
Parachuting, Adventure, Fun
School Collection
warning, Alert, exclamation mark
Animals
Summertime Holidays
Animals, Medusa, Sea Life
Multimedia Controls
Alert, warning, exclamation
People
Swimming Pool Icon Collection
Slippery, people, danger
Computer security icons
interface, Alert, exclamation
technology
Security Icon Set
emergency, danger, siren
Airline Icon Collection
warning, interface, signs
Basic UI Set
danger, Alert, warning
Qvadrons
Road Signs, signs, sign
cone, Construction, signs
warning, signs, exclamation
Navigation Glyphs
danger, Alert, exclamation
Business Element Collection
interface, signs, exclamation
exclamation, interface, warning
Web Navigation Collection
interface, danger, signs
Recreation Set
sports, risky, danger