area
attention
background
cam
camera
caution
cctv
control
crime
design
digital
equipment
graphic
guard
icon
illustration
information
isolated
lens
looking
monitored
monitoring
observation
observe
police
privacy
private
protect
protection
risk
safety
secure
security
see
sign
street
surveillance
symbol
system
technology
theft
video
video surveillance
view
warning
watch
watching
white
zone