Artificial Intelligence (AI) refers to the simulation of human intelligence in machines or computer systems. It involves the development of algorithms and software that enable machines to perform tasks typically requiring human intelligence. These tasks include problem-solving, learning from experience, understanding natural language, recognizing patterns, and making decisions. AI systems can be designed to perform a wide range of tasks, from simple data analysis to complex decision-making processes, and they can be categorized into various subfields, such as machine learning, natural language processing, computer vision, and robotics.