accident
alarm
alert
alertness
bell
box
break
building
button
call
control
copy space
danger
emergency
equipment
evacuation
fire
fire alarm
flame
glass
help
industrial
information
metal
office
panel
press
prevention
protection
pull
push
red
rescue
safe
safety
school
security
sign
siren
sound
sprinkler
switch
symbol
system
trigger
urgency
wall
warning
white