Manufacturing companies with a majority of their business in a manufacturing industry. Companies that generated less than 50% of revenues from manufacturing, but more revenue from manufacturing than the lowest-revenue-producing companies on this year's list. Computer software companies whose primary business is the manufacture of software programs. Oil and gas companies that derive at least 50% of their revenues from the refining of oil and gas products. Companies that derive at least 50% of their revenues from the manufacture of mined materials.Mergent collected the financial data elements directly from reports distributed by the corporations. To more accurately reflect the companies' core businesses, only revenue numbers from continuing operations were used. Where 2005 data are not available, 2004 data are provided. An "NA" appears where data were not available. For companies that have recently changed their fiscal-year end, the most recent 12-month figures have been used. 
