We consider free cash flow to be a liquidity measure that provides useful information to management and investors about the amount of cash generated by the business that, after the acquisition of property and equipment, including information technology infrastructure and land and buildings, can be used for strategic opportunities, including investing in our business, making strategic acquisitions, and strengthening the balance sheet.

ENGADGET: Google's Q4 2011 results: $2.71 billion profit, $8.13 billion in revenue, Wall Street disappointed

His goal, though, is to build a very cheap, very durable battery that can last an hour--that's shorter than other flow battery concepts, but it's long enough to be very useful to utilities.

FORBES

This is useful, she says, for purposes of stabilizing the climate, controlling floods, purifiying drinking water, regulating water flow, supplying bees and other pollinators that supply 20% of our food.

FORBES: Stanford Professor Uses Software To Value Nature