Artificial Intelligence (AI) refers to the simulation of human intelligence processes by machines, particularly computer systems. AI involves algorithms that allow machines to perform tasks that would typically require human cognition, such as learning, reasoning, problem-solving, and understanding natural language. Machine learning, a subset of AI, enables computers to learn from data and improve over time without explicit programming. AI applications range from virtual assistants like Siri and Alexa to advanced robotics and autonomous vehicles. The technology has transformed industries like healthcare, finance, and manufacturing, driving innovation and enabling new forms of automation.