英文關鍵字
balance
bank
banking
bill
business
buy
buying
card
checkout
client
close
commerce
credit
currency
customer
cyberspace
debit
debt
device
digital
electronic
finance
financial
giving
hand
horizontal
key
keyboard
keypad
machine
machinery
magnetic
money
number
pay
paying
payment
pin
purchase
retail
sale
selling
shopping
store
system
technology
terminal
transaction