AI is nothing to be afraid of. After all, AI is merely software. It's great at some things and (at least right now) terrible at others. But for workers who take time to experiment with AI and develop expertise, AI will make them more productive and more creative, saving them time, giving them job security, and boosting their income. Wall Street Journal columnist Christopher Mims introduces readers to people just like them who are at the forefront of using AI in the world of work.