Replying to 16mm film process

A friend of mine is interested in starting his own production company and he wants me to help him.  It's easy to shoot in HD (well not easy, but you get my point), but what I'm wondering is how the process of shooting in 16mm works. 

I know that 16mm cameras are used for slow-motion shots because they shoot at a high FPS (like 48 or so) and then can be slowed down to the average 24 FPS for a really clear, slow shot.  But what I don't know is how to move the footage you get on a 16mm camera from the camera to a computer, and then edit it digitally.  I suppose this is something you learn at film school, but can anyone give me a brief description of how this works?