Deep Learning is a subset of Machine Learning,which itself a subset of Artificial Intelligence. Artificial Intelligence (AI): Any algorithm or technique that allows computing devices to make decisions or solve problems that previously required humans to perform them manually can be called an AI algorithm or technique. An AI can be either a huge stack of simple if-else statements or a very complex algorithm. If you have studied Artificial Intelligence in your school or college,you would read something titled "Rule Based Systems", which is nothing but a collection of IF THEN statements,to perform a task. An example of a Rule based system is MYCIN,which is developed to identify bacteria causing severe infections and to recommend antibiotics by Stanford,which has basically nothing but IF THEN statements.