GEEP

Your history is a bit behind. We do now have P7P (in two versions).

This is described as Poser Pro not to be confused with Poser Propack.

So keep in mind the general notation is:
P4 for Poser 4
PP for Poser Propack
P5 for Poser 5
P6 for Poser 6
P7 for Poser 7
P7P for Proser (7) Pro

Additionally we also often use DS for DAZ Studio, C6 for Carrara 6, and V6 for Vue 6.
And don't forget EF for the previous owner of Poser and SM for the current one.