What is Mark using that the man needs?

M: I’ve been looking all over the office for the overhead projector. Do you know where it is?
W: Well, I used it this morning and then Mark needed it. He might have it in the conference room.
M: That’ s good to know. I need it for my presentation to the stockholders at 3. Do you think he’ II be finished by then?
W: I think so. His meeting started two hours ago and it will be finished any minute. I’ll have him bring that to your office when he’s done.