Highest Possible Level of Development.
This is a concept (and abbreviation) from a Stanislaw Lem story1. The idea is that there is an end-state of technological evolution, when it is possible to carry out everything consistent with physical law, and that this end-state is essentially unique. Because of the uniqueness of this state, it is possible to theorize usefully about it, while the paths between here and there are shrouded by mind-boggling complexity e.g. the Singularity.
1- Altruizine, or A True Account of How Bonhomius the Hermetic Hermit Tried to Bring About Universal Happiness, and What Came of It
-Back to the Transhumanist Terminology metanode