GreenLight Biosciences is a privately-held biotechnology company focused on improving human health and the environment through the sustainable production of chemicals and fuels from renewable, non-petroleum based resources.
Generation in computer terminology is a change in technology a computer is/was being used. Initially, the generation term was used to distinguish between varying hardware technologies. But nowadays, generation includes both hardware and software, which together make up an entire computer system.
For instance, each release of Windows is a 'new generation'. This is always true though: a new generation in technology will be the newest technology on the market. As for how many generations of computer technology have passed until now.. that is just impossible to say really.