Hospitality industry. Hotels, clubs, restaurants, etc. Food service Travel and state. Tourism 5 Food service 4 Travel and the state. Tourism 4 Building operation and housekeeping 2 The house. Including arrangement, care, servants 2 Communicable diseases and public health 1 Consciousness. Cognition 1 Consumer behavior. Consumers' preferences. Consumer research. Including consumer profiling 1 Consumer satisfaction 1 Electronic commerce 1 Employee participation in management. Employee ownership. Industrial democracy. Works councils 1 Heritage tourism. Cultural tourism 1 Marketing 1 Personal health and hygiene. Including clothing, bathing, exercise, travel, nutrition, sleep, sex hygiene 1 Personnel management. Employment management 1 Quality control 1 Social aspects. Social marketing 1 Travel agencies and clubs 1 Vocational guidance. Career development 1