Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, particularly computer systems. These processes include learning (the acquisition of information and rules for using it), reasoning (the ability to solve problems and make decisions based on that information), and self-correction. AI encompasses a variety of technologies, from machine learning and natural language processing to robotics and neural networks.

AI can be categorized into two main types: narrow AI, which is designed to perform specific tasks (such as facial recognition or voice commands), and general AI, which possesses the ability to understand, learn, and apply intelligence across a wide range of tasks, similar to human cognitive abilities.

Applications of AI can be found in numerous fields such as healthcare, finance, transportation, and entertainment, where it enhances efficiencies, improves data analysis, automates routine tasks, and contributes to advancements in technology. As AI continues to evolve, it raises important ethical considerations about privacy, security, and the impact on employment and societal structures.