What is the difference between Artificial Intelligence, Machine Learning and Cognitive Technology?

Recently there has been an explosion of buzz words related to Artificial Intelligence. My goal with this article is to discuss the differences between Artificial Intelligence, Machine Learning and Cognitive Technology. I invite you to join in, it is very likely I am missing elements that you might be more familiar with. Artificial Intelligence (AI) is the hype at the moment. In most cases, the hype is related to a specific subclass of AI known as narrow AI.