As a subdomain of computer science, the field of artificial intelligence deals with the automation of behavior and machine learning.
It essentially implies simulating human intelligence and learning, i.e. by collecting information and finding rules for using that information.
Computers are programmed to solve problems and complete tasks in a relatively independent manner by combining data science, processing power, and algorithms.
There are many categories but most or all of AI are trained with ML
Categories:
Speech recognition and natural language processing: how to process speech (auditory input) and language
Computer Vision: how to process visual input
Knowledge Representation and Reasoning: how to represent the world and reason about it efficiently