All the money (or other items of value) that came into the company during the given period. Revenue includes everything: sales, interest income, proceeds from the sale of a subsidiary and so forth. Revenue is thus one of the most reliable items on the income statement, as opposed to net income, which is subject to various accounting and managerial judgments. But the all-inclusive nature of revenue can make it misleading. If 50 percent of revenue in a given year came from the one-time sale of some land, clearly one shouldn't assume that the business will have similar revenue in future years.