Companies earn revenues from the sale of goods or services to customers (in Maxidrive's case, from the sale of disk drives). Revenues normally are reported for goods or services that have been sold to a customer whether or not they have yet been paid for. Retail stores such as Wal-Mart and McDonald's often receive cash at the time of sale. However, when Maxidrive sells its disk drives to Dell and Apple, it receives a promise of future payment called an account receivable, which later is collected in cash. In either case, the business recognizes total sales (cash and credit) as revenue for the period. Various terms are used in income statements to describe different sources of revenue (e.g., provision of services, sale of goods, rental of property). Maxidrive lists only one, sales revenue, in its income statement.