Retailing involves the direct sale of products and services to consumers for their personal use. Retail is driven by consumer spending which depends on disposable income and consumer confidence. Global retail sales have nearly doubled since the 1980s, with the US leading, and retail in Asian economies is growing 6-10% annually. Various types of retailers include specialty stores, department stores, supermarkets/hypermarkets, convenience stores, discount stores, and off-price retailers. Operational issues for retailers include supply chain management, pricing, sales channels, and retail strategies.