Citigroup (NYSE:C) is one of the world's largest diversified financial services firms, generating revenues of over $81 billion in 2007. The firm's principal businesses include: Global Consumer Group, Corporate and Investment Banking, Global Wealth Management, and Alternative Investments. Citigroup makes money by underwriting debt and equity issues, meaning that Citigroup helps other companies issue bonds or stocks to raise money. The firm also provides wealth management advice to wealthy clients in addition to providing mortgages, credit cards, and other financial services through its commercial banking division. The firm had over $2.1 trillion in assets as of December 30, 2007, serves clients through 2,900 retail branch locations and 1,800 consumer finance locations, and employs 332,000 people in 50 different countries.