abstract
alarm
architecture
away
background
bar
building
caution
close
construction
danger
direction
door
doorway
emergency
entrance
escape
evacuation
exit
fire
green
guidance
hallway
handle
industrial
information
isolated
leaving
lock
metal
modern
office
prepared
protection
push
rescue
route
safe
school
secure
security
sign
steel
system
urgency
warning
way
white