In October 2006, Forbes released its 400 richest people in America issue. The billionaires were placed in these following categories:
Landlords- Real Estate Industry
Technocrats- Technology Industry
Cash Kings- Finance Industry
Headliners- Entertainment Industry
Sharp Suitors- Fashion Industry
Team Players- Diversified Industry
Courtesy Callers- Service Industry
Healers & Dealers- Health Industry
Bricks & Mortar- Manufacturing Industry
Taste Makers- Food Industry
Petro Princes- Oil Industry
Heavy Hawkers- Retail Industry
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