Yes, enterprise value (EV) is equity market capitalization (stock price times # of shares) plus the market value of debt (this can be lower than the book value of debt). Financial analysts often prefer to calculate something called "Net Enterprise Value", which is EV minus "excess cash" (total cash minus "required cash", where required cash is usually calculated as a certain % of sales). Net Enterprise Value gives you the present value of all future cash flows to the firm (you are ignoring the value of today's excess cash, which doesn't come from future cash flows). This is particularly useful when looking at companies like AAPL with tons of cash.