For programmers, the perfect book is a source of reference, that provides examples and acts as a stepping-stone that raises you to the next level.

FORBES: Dummy books are for dummies

Already, thousands of pictures have been deposited in the Herschel archive, which is set to become a key reference source for decades into the future.

BBC: Herschel space telescope to go blind

Bizarrely, one of Dr Lomborg's critics in Scientific American criticises as an affectation the book's insistence on documenting every statistic and every quotation with a reference to a published source.

ECONOMIST: ��The Skeptical Environmentalist��

The press quotes a little know lab, Alab-Berlin, as the source of the evidence but there is no reference to the report this morning on the alab-berlin.de website.

FORBES: More Concerns About Cancer and Energy Saving Light Bulbs: Justified?

This is a well-known problem and one I wrote about in 2011, with specific reference to Twitter which was at the time a significant source of direct visits.

FORBES: Filling In The 'Direct Visits' Data Hole

Risk awareness relative to the reference index has become paramount among fixed income players and arguably a source of alpha in and of itself.

FORBES: With Bond Yields So Low, Why Should You Pay More For Active Management?

Creatively calling the plug-in boards "capes" in reference to the cape worn by a beloved cartoon beagle super hero, the active open source BeagleBoard.org community designed the plug-in boards to foster an even wider range of innovations such as robot motor drivers and sensors that measure location and pressure.

ENGADGET: BeagleBone gets plenty of expansion options with new 'cape' add-ons