Quote from aagcnet
The tech used in Accel world is an improved version of SAO... what happends with the tech in Accel world is in part one of kirito's Goals.
In accel world they talk only about the past tech used in SAO. So far aside from the event where those gamers were captured and the nervgear or whatever the na ...
So, speculation? Or do you remember where they mentioned the SAO events? Would love to see it actually, getting curious.