What is Artificial Intelligence (AI), Machine Learning (ML) & Deep Learning (DL)?

The terms artificial intelligence, machine learning, and deep learning can be very unclear and muzzy sometimes even by its practitioners as it is used in the same context interchangeably. Lets begin with the popular "Artificial Intelligence". The term "Artificial Intelligence" has been around for over 60 years. Of course it triggers a lot of connotations to people when they hear the term especially at the first instance. Some of the ideas describes computers as being smart from probably getting some good article or data from the internet like Wikipedia.