Gotta be honest with you. I was kinda hoping for a big blank page with 2 letters spelling NO.
But interesting topic - and at least you got a couple of comments. :D
Even if he did, so what? Herbert wrote science fiction, which requires some gizmos or technology to at least be different than today's. Any Sci Fi author throws out things to remind readers they're "in the future" or whatever. By dint of writing a lot, prolific authors get some things right.