Chrysler has a great recipe for minting money: Take a simple engine technology, jazz it up and rechristen it.

FORBES: The Engine That Could

The U.S. Department of Energy researchers have designed a remarkably simple, energy-efficient engine with no moving parts.

CNN: Lab develops engine for the future

Amazon S3 and Simple DB and Google App Engine all charge based on storage, bandwidth, and CPU time.

FORBES: Cloud Computing's Hidden 'Green' Benefits

The difference between turbocharging and supercharging is simple: a turbocharger boosts engine air pressure by using exhaust gas to power a turbine that pushes more air into the combustion chamber.

FORBES: 2012 Audi A7 Test Drive and Review - High-Tech Meets High Style

Converting an engine to run on hydrogen is relatively simple.

ECONOMIST: Hydrogen-powered cars