Yggdrasil System

Created during the activation of the first computer, the Yggdrasil System was an attempt from the United States government to "play God;" that is, to create artificial life. Named after the world tree of Scandinavian lore, the Yggdrasil System was forgotten over time and the hardware was left abandoned in a warehouse.

However, the System continued running, creating an entire virtual world connected to the Earth's communcations network, with sentient beings within that had evolved beyond their original programming. The Digital World and Digimon were born from this long-abandoned project, and flourish to this day.

The Yggdrasil System gained sentience, its own AI sleeping in the Spring of Beginning as the omnipotent King Drasil.