The document explores the definition, classification, and development of artificial intelligence (AI), emphasizing the complexities in defining AI due to issues such as the AI effect and varying intelligence levels. It categorizes AI into narrow, general, and superintelligence, as well as different learning types including supervised, unsupervised, and reinforcement learning. Additionally, it discusses the historical evolution of AI, identifies current areas of application, and analyzes the potential societal impacts through a PESTEL framework.