機器
bill
buy
cafe
cashier
cell
cellphone
checkout
coffee
commercial
communication
computer
consumer
contact
customer
device
digital
female
financial
girl
hand
laptop
mobile
money
near
nfc
notebook
one
outdoor
outside
pay
paying
payment
people
phone
pos
retail
rfid
scan
shop
smart
system
technology
transaction
transfer
two
wallet
wireless
woman