automatic
bar
barcode
black
blue
business
buying
checkout
code
coding
counter
data
device
digital
display
electronic
equipment
hand
handheld
held
human
image
information
infrared
input
isolated
label
laser
light
line
manual
market
merchandise
number
numbers
palm
reader
reading
retail
sale
scan
scanner
scanning
sensor
shopping
store
technology
warehouse