I've never looked under the hood of a `cdr` implementation but I feel pretty confident in saying that it's likely to be an incremented pointer most of the time.

I've never looked under the hood of a `cdr` implementation but I feel pretty confident in saying that it's likely to be an incremented pointer most of the time. Learning C (and even a little ASM), gives a better understanding of the underlying layers. I think that provides a great foundation for learning a scheme, and then branching out from there.