Data Rescue

When we fled Gnomeregan, we left so much data behind! Vitally important data! I need the data on a prismatic punch card, from a Matrix Punchograph 3005-D high security terminal, deep in Gnomeregan. You must access the terminal, but to do that you first need clearance... and to get that you must access lower security terminals-- models -A, -B and -C. And to do THAT you need security punch cards, starting with white... and we left all the punch cards in the city. It's a catastrophe! Can you help?