Hi Nanner-
The  term "disk" was proposed by Bruce in what I believe was his first book of the series - I just moved and my copies are still inpacking boxes so I can't look it up - He said that he saw this thing and that it had images like faces, mostly people, but one of which happened to be Snidely Whiplash, a cartoon character. He attached awareness to the image and discovered himself in the person of Snidely for a moment .

Thus the disk is a connection by which one's "Knower" hooks onto a personality construct so as to bring it into the world. And disks hook onto one another sequentially, like bromeliads that grow new shoots out of the old.

I am somewhat uncertain whether Bruce sees the disk system as creating horizontal links to other disk systems, but this seems to me to be implied. Then we'd get a sort of "Indra's Net" effect.

Bruce- could you elaborate a bit more on this?

dave