Intel Mac Startup Key Combinations

Browsing through my bookmarks from last week, I found this list of startup key combinations for the Intel Macs.
Most of these are the same as their PPC brethren, and I don't know if the "D" one to boot into the Apple Hardware Test is new or not.

In any event, I thought it useful enough to share with readers. I especially like being able to differentiate between netbooting (N) and netbooting with the default selected image (Option – N).
Very useful in the lab environments that I control.