I noticed with the exception of Terminals 4, 6, and 7 none of the gates are numbered/marked at the various terminals. How does a KLM flight or a Delta flight know what gate to pull up to if their not visually numbered? Yes you can have in the cockpit documentation but usually gates are clearly numbered. I also noticed in the AFCAD FedEx has no parking spots neither does Atlas/Polar Air. Now I may have missed something with the AFCAD but concerning the parking spots one would think at such a congested airport things would be marked as clear as possible. Even with charts a Northwest flight landed at a wrong airport in the Salt Lake City area. Concerning KJFK with night operations I can't see how things aren't clearly marked yet the job get's done...