Basically, when you have your first photo taken by a Disney photographer, they will give you a credit card-style card with a long number and UPC code on the back. Instead of getting little slips of paper all day for each photo taken, you will just load all of the photos onto this card. I don't know how far they've implemented the system yet at DCA, but the end result will be that you don't have to waste time going to the photo shop at the end of the day, instead, you can wait until you get home, register your card online, see your photos, make edits, purchase and have them mailed to you.