Trans-hyperspacial Leveling

Trans-hyperspacial Leveling defines everything that Hyperspace includes. This level sorting system includes universes, multiverses, Planes of Reality and dimensions. The system was discovered by Marlies Oddrún in 2208 and is the first hyperspacial discovery.
The system goes as follows:
hyperspace
dimensions
PoRs
multiverses
universes
space

Classes below others are inside the classes that are above them, and vice versa.

Alexandra: How do you know all of this?!
Bob: It all started when I found out about Trans-hyperspacial Leveling...
Alexandra: What...?