機器
adult
background
buy
buyer
cashier
cell
cell phone
commercial
communication
consumer
copy space
credit card
cropped
customer
daylight
display
easy
electronic
electronics
expense
field
finance
grocery
hand
image
keyboard
male
man
market
mature
mobilephone
near
number
one
outdoors
partial
payment
payment terminal
payments
person
photo
picture
rfid
sale
seller
smartphone
telecommunication
terminal
wireless