Bill Gates is the chairman of Microsoft Corporation, the world’s largest computer software maker, which he founded in 1975. He launched the Bill & Melinda Gates Foundation in 2000 to support philanthropic initiatives in the areas of global health and learning. The Foundation has since dispersed $26.1 billion in more than one hundred countries focusing on endeavors such as expanding childhood immunization, providing microfinance for small farmers, and supporting college education. In developing countries, it concentrates on improving people’s health and giving them the chance to lift themselves out of hunger and extreme poverty. In the United States, it seeks to ensure that all people—especially those with the fewest resources—have access to the opportunities they need to succeed in school and life. On Twitter: @BillGates.