Magic's just science that we don't understand yet.
Any technology distinguishable from magic is insufficiently advanced.
I'm surprised at some technological development, and the realization that any sufficiently advanced technology is indistinguishable from magic. I think the CD-ROM is the best example of that. The idea of having a whole symphony, or opera, or novel in a little piece of plastic is pretty amazing.
Any smoothly functioning technology will have the appearance of magic.
