American Express earns revenues from card licensing fees, royalties on billings, charge volume, net spread revenue and cards in force, foreign exchange conversion revenue and also a share of the discount revenue earned by the operator.

FORBES: Quick Take

Also on the docket is an eye-controlled set that lets viewers take charge of volume and channels with their peepers and a 3D gesture control system that has a camera built into the set's frame.

ENGADGET: Haier celebrates IFA with ultra high def 3D, transparent and eye-controlled TVs

Compared to US carriers, Chinese carriers charge much less for SMS messages, but the volume in China is so high that it has become a major revenue source.

FORBES: Will iMessages Fly in China?

One way of doing that is to work out the cost of disposal and charge firms and households for rubbish collection based on the volume they produce.

ECONOMIST: The waste industry

From a full charge, we were able to stream Pandora over Bluetooth at maximum volume (a worst-case scenario) for five full hours before the box gave up the ghost, and managed well over sixteen hours in mixed testing with a variety of sources and settings.

ENGADGET: Jawbone Jambox review

If networks serving local startups need to pay interconnect fees, they will have to charge substantially more for serving any business that generates a large and growing volume of requests for its content.

FORBES: Proposed Web Regulations Threaten Free Internet

The included remote controls volume and muting, as well as most wirelessly connected music sources while they charge and play simultaneously.

ENGADGET: Klipsch's Music Center KMC 3 Bluetooth speaker costs $400, will be available in June

Among the most dramatic of Bush's proposals is a fee that the Federal Aviation Administration would charge airlines to help pay for new air traffic control services, which are becoming strained by an increasing volume of air traffic.

FORBES: Magazine Article