Yet class categories remain surprisingly resilient, which seems to fly in the face of recent economic reality.

ECONOMIST: Class

Investment portfolios are comprised of multiple funds that represent several asset class categories.

FORBES: Indexes Beat Active Funds Again in S&P Study

Differentiating between categories within an asset class can also be straightforward.

FORBES: How To Harness The Power Of Passive Investing

Then Booth's categories, which reflect wealth (and, in the case of the lowest class, morality) must be aligned with the census categories, which record socio-economic status.

ECONOMIST: How Charles Booth��s map of Chelsea has been updated

No matter that, in the October, 2011 data from the Congressional Budget Office, which is used to fuel the class warfare rhetoric, in fact all categories of income rose during the studied period (1997-2007).

FORBES: Obama Exploits A Downturn To Engineer Us Socially

He said his firm would put in place an "attractive" fare structure, including a 15% reduction in standard tickets and new categories of fares, including a new class between standard and first.

BBC: UK Politics

Despite this striking change, when they are asked to place themselves in a class, Brits in 2006 huddle in much the same categories as they did when they were asked in 1949.

ECONOMIST: Class

If production for existing or extended categories is shifted outside the organization, are relationships struck with best-in-class resources?

FORBES: Post-Visionary Licensing Diagnostics