機器
accounting
card
cellphone
center
check
code
connection
convenient
coupon
credit
data
discount
display
ecommerce
electronic
financial
finger
hand
history
holding
indoor
information
mall
mobile
money
nfc
pay
payment
phone
quick
response
retail
scan
screen
share
shop
shopping
smartphone
store
system
telephone
ticket
ticketing
touch
transaction
using
verification
wave
woman