No intention of hijacking a thread, but as a non-DiMarzio guy who is looking to dip his toe in the water sometime:
What's the difference between air and non-air pickups?
I know it's some patented technology DiMarzio has that lets them accomplish various things tonally, but I was never clear on it.
Also "Norton" does not really give an indication of what a pickup sounds like. It is, however, a well known antivirus and system optimization suite from the 1990s and 00s.