機器
bill
business
buy
cashier
cell
cellphone
check
checkout
commerce
communication
consumer
contact
contactless
customer
device
digital
electronic
financial
hand
mobile
mobilephone
money
near
nfc
one
pay
paying
payment
people
phone
pos
retail
rfid
scan
shop
smart
smartphone
spend
station
store
system
technology
terminal
transaction
transfer
use
wireless