AI is extremely powerful and can be used in ways that negatively affect society. To develop and use AI systems responsibly, AI developers must consider the ethical issues inherent in AI. They must have a realistic view of their systems and their capabilities and be aware of the different forms of bias potentially present in their systems. With this awareness, developers can avoid unintentionally creating AI systems that have a negative rather than positive impact. Even outside the realm of science fiction some conversations about the ethics of AI suppose that AI will become sentient, that is become self-aware, develop its own moral code and turn against its inventors. Nick Bostrom of Oxford University says in the very long term machine super intelligence might eventually match human intelligence and that when that happens there may be risks to human society.