It's a Copyright Code tool.
The Section 108 Spinner lets you determine if a request meets code standards quickly and easily.
Really, I kid you not - it's interactive and everything. You can "grab" the wheel with your mouse and roll it around to whichever section addresses your particular question.
So if you happen to have a special collection or archives, and you have an unpublished manuscript that's gradually fading away, the spinner says....
Libraries or archives may make up to three copies of unpublished works for preservation or security purposes, if: