This just happened to me. I was in the office next door fighting with some electronics (they were winning) and had the following converstation with a student worker.
SW - Can you help me work the typewriter?
Me - Sure. What do you need?
SW - (Holds up an address label) I need to type an address on here.
Me - Er...okay. Here is your paper guide and you stick the paper in like this...
SW - Where's my paper guide?
Me - Right here. (Points to paper guide)
SW - Oh! Okay.
Me - Then you can use the paper up or paper down to move the paper where you need it to be. You can use the tab button to move to the position you want. Here, I'll set you a tab for the label. (Sets tab) Then when you hit enter, you can tab over to where you need to be. (Hits tab)
SW - Okay. (Pause) So it's just like a computer?
Me - Uh, yeah.