Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. These processes include learning (the acquisition of information and rules for using it), reasoning (the ability to use rules to reach approximate or definite conclusions), and self-correction. AI systems can be designed to perform specific tasks, such as driving cars, recognizing speech, or playing games, or they can be more general and capable of performing a wide range of activities.

AI can be categorized into two primary types: narrow AI and general AI. Narrow AI, also known as weak AI, is designed to perform a narrow task (like facial recognition or internet searches) and is the most common form of AI in use today. General AI, or strong AI, would have the ability to understand and learn any intellectual task that a human being can, but it remains largely theoretical and has not yet been realized.

AI employs various techniques, including machine learning (where algorithms improve through experience), natural language processing (enabling machines to understand and respond to human language), and robotics (the design of robots that can perform tasks autonomously). As an evolving field, AI has significant implications for various sectors including healthcare, finance, education, and entertainment, and raises important ethical and societal considerations regarding privacy, security, and job displacement.