A: I need a new computer.
B: What's the matter with yours?
A: It's six years old.
B: That's pretty old.
A: It still works, but I'm going to give it to a charity.
B: Are you going to buy a desktop or laptop?
A: Oh, a laptop, of course.
B: A PC or a Mac?
A: I haven't decided yet.
B: More and more people are using Macs.
A: But 90 percent of the world uses PCs.
B: And that's not going to change anytime soon.