It's a complex picture, but at its core is the high-tax welfare state run amok.

WSJ: Boskin and Cogan: California's Greek Tragedy

Zynga has also moved beyond its core DNA of casual gaming, to build "mid-core" games, which are slightly more complex and visually rich.

WSJ: Zynga to Cut 18% of Workforce to Pre-IPO Level

The state Education Department says the 2013 test questions will be more advanced and students will be challenged to perform more complex tasks in line with the Common Core standards that have been adopted by 45 states and the District of Columbia.

WSJ: Some NY parents to boycott new, harder state tests

It is true that the core operating hardware for buildings, from home furnaces to complex office HVAC systems, is dramatically more efficient than 20 years ago, and getting better still.

FORBES: Magazine Article

The core of the project is its camera, the largest and most complex built to date.

ECONOMIST: The Sloan star survey: An intergalactic cruise | The

"While legal issues involving copyright law are always complex, we believe the project is wholly consistent with the core principle of copyright law, " says James Hilton, the head librarian at the University of Michigan.

FORBES

Kidjo's music is completely contagious, with rhythms that sound like a complex combination of soul and Brazilian music, and that at the core reflect her West African roots.

NPR: Angelique Kidjo: Dancing Her Way To The Front

For what it is worth, RBS does not believe that the issue raised by many - that all the banks have creaking ancient and complex computer systems, on to which they are constantly grafting updates - is the core weakness.

BBC: Is outsourcing the cause of RBS debacle?