8+1? Like as in 8 years and one? I don't get it, but I do get what you mean outside of GURPS talk.
From a Wikia on GURPS:
Tech Level
Tech Levels are a crucial part of GURPS system, and of the Infinite Worlds setting. Very simply, they can be listed on a scale from Tech Level 0 (Stone Age) through Tech Level 8 (Digital Age) to Tech Level As High as the Game Master wishes (sci-fi). This is however complicated somewhat by a special nomenclature for split technologies (if a world is more advanced in some fields), and different technologies (psi, magic, science). This page will attempt to provide a brief overview. For full overview, see references.
In GURPS-speak, "8+1" means roughly "Microtech Age looking like Digital Age."