I've been away for a while, but I wanted to share one of the ways I've been using the Apple iPad.
iPads are great tools for paper modeling. Besides it’s size and portability, it can hold a great many models. In-fact, I can hold all my automata models in it and call them up by a simple tap of the screen. I do this using the free apps Dropbox and GoodReader. Dropbox is a cloud based storage folder. I have the program on my computer, iPad and phone. Whatever file I drop in one device is synced to the others. I’m using GoodReader to download and store models on the iPad. I can also send them to the printer.