Difference between AI and NLP ?

This AI (Artificial intelligence) and NLP (Natural Language Processing) is use for a chatbot and webchat as well. Artificial intelligence (AI) is the ability of a computer or a robot controlled by a computer to do tasks that are usually done by humans because they require human intelligence and discernment. On the other hand Natural Language Processing (NLP) for short, is broadly defined as the automatic manipulation of natural language, like speech and text, by software.