Ajax is the famous world of robots. It was once an average desolate orange rocky planet with beautiful purple rings until enterprising inventors from the Sirius Cybernetics Corporation, the Inventors Guild, and a few similar organizations signed a treaty turning it into a free field-testing and experimentation zone for new robots. The robots proved so intelligent, however, that the organics thought it much safer to simply abandon them there and work in their laboratories where uprisings would be more easily dealt with. Clearly no one had told them the story of IG-88.
The robots learned how to build more of themselves, which grew more advanced with every generation. Soon they had structured their own society.