Market capitalization, or "market cap", is the aggregate market value of a company represented in a dollar amount. Since it represents the “market” value of a company, it is computed based on the current market price (CMP) of its shares and the total number of outstanding shares.
Enterprise value (EV) measures a company's total value, often used as a more comprehensive alternative to equity market capitalization. EV includes in its calculation the market capitalization of a company but also short-term and long-term debt and any cash or cash equivalents on the company's balance sheet.
The enterprise value-to-revenue multiple (EV/R) is a measure of the value of a stock that compares a company's enterprise value to its revenue. EV/R is one of several fundamental indicators that investors use to determine whether a stock is priced fairly. The EV/R multiple is also often used to determine a company's valuation in the case of a potential acquisition. It's also called the enterprise value-to-sales multiple.