Artificial Intelligence (AI) is a wide term applied to machines performing intelligent task. Machine Learning (ML) is a part of artificial intelligence. It is probably the part that is currently evolving faster and it is indeed revolutionizing many sectors.
The application of Artificial Intelligence in human resources has an enormous potential, but it faces some challenges that are becoming very evident.
ML takes advantage of huge amounts of data to notice things that humans are not able to detect because of the volume and complexity of the information to be analyzed. An example of AI, which is not ML, would be a computer programmed with chess rules. A computer can calculate alternative movements fast enough to play chess at a good level.