accident
alarm
alert
art
attention
brake
button
collision
concept
connection
design
editable
error
forced stop
graphic
hazard
icon
illustration
importance
important
indicator
information
internet
isolated
line
linear
message
network
no
notification
occasion
phone
pictogram
pointer
priority
risk
safety
security
sign
stencil
symbol
telephone
threat
toxic
triangle
warning
web
zone