Actually, Arthur is already on my reading list. ;) I think I must have seen him recommended before by Kevin Kelly or perhaps Don Ihde.

One very broad range of technology which has no analog to magic is high precision instrumentation.

I was going to point out that another good example is all the sensory modalities that science knows of, like electromagnetism in all its forms and frequencies, or gravity itself, but I thought that they were too arguably close to magical 'second sight' or chi skills like sensing someone nearby.