So it appears that you haven't read the book yet. The London lecture, btw, was very good, and it was really an outstanding overview of the book. But there is a tiny terminology gap that will exist until you've had a chance to read the book. Regarding the terms I used in my reply, they are as follows:
- a. PMR - Physical Material Reality. This means everything in the known, physical universe.
b. NPMR - Non Physical Material Reality. This means everything outside our PMR and within our System. Think in terms of set theory, or just draw circles within circles, with PMR on the inner most area, then NPMR.
c. System, or Our System - This means a circle than encloses it all.
Now, if memory serves the above concepts were shown in some of the slides of the London Lecture, which might, or might not have been viewable to you depending on the quality of the video you watched.
Within Our System are many PMRs, but there is only one NPMR with Our System. There are, however other Systems as well with their own PMRs therein.
I hope this is sufficient to explain the acronyms. Are you able to locate the book for yourself?