機器
arm
bar
barcode
body
code
computer
concept
confidential
control
crime
data
detection
digital
flag
free
freedom
guyana
guyanese
hand
human
id
identification
identify
identity
information
man
mark
national
no
personal
printed
privacy
protection
registration
risk
safety
science
secure
security
sign
slave
slavery
system
technology
tracking
work
world
wrist