機器
amount
authorization
authorize
background
banking
bill
business
buy
card
cashier
checkout
commerce
consumer
consumerism
credit
customer
debit
device
digital
electronic
finance
financial
hand
handwriting
holding
merchant
money
paying
payment
pen
people
person
purchase
reader
receipt
retail
sale
service
shop
shopping
sign
signature
signing
store
tax
technology
terminal
transaction
write