PDF

Again and again convinced that is really nice format for all kind of documents. There is representative, protected and without any kind of format or printing problems. And I think it should be used everywhere where you have work with edocumentation. But today I've discovered for myself even more features of PDF. It's called 3D PDF and basically allowed you to see 3D images right into the document, well with my default PDF reader on my Mac it does not working, I've seen how it works on Adobe PDF reader and it's really cool!
Here is a video how it works