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alert
area
background
camera
cctv
circuit
clip
closed
computer
control
danger
data
digital
equipment
guard
hour icon
illustration
industry
label
lens
look
monitor
observe
pictogram
protection
protector
record
safety
secrecy
secure
security
set
sign
signal
spy
sticker
store
surveillance
survey
symbol
system
technology
television
under
video
view
visual
watch