keeping track

Is it at all possible to have to 2d posts store information on line as you sing in and scan it, it would ask you for your name, or where you are from. So it would keep track of all the people that scanned it. In a way it would be a like a guest book that you sign when you go to a museum or something. I think it would be interesting to look back at the end or even as you scan it, and see who else was here before you.