The LIVE 5000 is voiced to produce the best frequency response, group delay and tone quality to faithfully reproduce any program material.

ENGADGET: Altec Lansing Live 5000 WiFi music system makes its debut, plays nice with Android and iOS (ears-on)

The other, which faces a specialised type of solar cell made of a material called indium gallium arsenide, is sculpted into a structure called a photonic crystal that causes it to emit infra-red radiation selectively at the frequency best absorbed by the cell.

ECONOMIST: Solar power

Sometimes images taken at a specific frequency provide the best contrast.

ECONOMIST: Monitor

One of the largest high-frequency trading firms recently plucked one of his best engineers.

FORBES: Picking The Fastest Black Boxes

Last year the best-performing short was Endwave, which makes radio frequency identification systems.

FORBES

ABB's best trick is its ability to take electric current of any voltage and frequency, chop it up into tiny bits and reassemble it into the form needed.

FORBES: Companies, People, Ideas

Given the frequency and volume of traffic that sports stadiums generate, if teams and owners back best practices, that should lead to significant progress in many cities.

FORBES: The Green League: CSR Hits Pro Sports