Scholars working in the sociology of markets, organization theory, and strategy research in North America, Europe, and South Korea provide 11 essays on categorization as a cognitive and social process, focusing on categories in the context of markets. They consider categorization as a tool for social evaluation; categorization as politics and strategy, in terms of how technology firms categorize themselves and how analysts categorize those firms, the use of hybrid categories, and how meaning is constructed through discourse in market categorization; how unknown or ambiguous objects are categorized, such as Bitcoin, the information privacy category, and how the Sundance Institute reoriented the value of independent film; and the influence of time and place on the categorization process, in terms of category origins, organizational identity, and category spanning.