Categorization is the fundamental cognitive and computational process of grouping distinct entities into classes or categories based on shared attributes, rules, or principles. As a research concept, it investigates the mechanisms by which categories are formed, structured, and utilized across various domains, examining factors such as feature detection, boundary definition, prototype formation, and the influence of learning and context. Its significance is paramount in understanding perception, knowledge representation, decision-making, and communication across disciplines like psychology, linguistics, philosophy, and artificial intelligence.