I was looking at NYU's FAQ and this was on of the Q&As I came across: Q: If I received AP credit, can I use it to fulfill a required course? A: Yes, as long as it appears as AP credit on your undergraduate transcript. On the secondary application, enter AP in the grade box. Please note: We do not accept exempt credit for any required course. What does "exempt credit" mean? I'm thinking it's something different from AP credit, because otherwise I have no idea what their answer is.