A: Why didn't you buy a bus ticket?
B: I have a tap card.
A: What is a tap card?
B: It stores money for me to use when I ride the bus.
A: Is it like a credit card?
B: It works exactly like a credit card.
A: How did the bus driver know you had one?
B: I tapped it on his ticket console.
A: I see. That is much faster!
B: Yes, and much more convenient.
A: Maybe I'll get myself a tap card.
B: You should. You'd save time and money.