Among the nation's largest banks by assets (alongside JPMorgan Chase and Citigroup), ubiquitous Bank of America operates one of the country's most extensive branch networks with some 4,700 locations and more than 16,000 ATMs. The bank's core services include consumer and small business banking, corporate banking, credit cards, mortgage lending, and asset management. Its online banking operation counts some 33 million active users and 20 million-plus mobile users. Thanks largely to its acquisition of Merrill Lynch, known as "The Bull," Bank of America is also one of the world's leading wealth managers -- with more than $2 trillion assets under management -- and boasts a beefed up trading and international businesses.