Business magnate, investor, and philanthropist. Co-founder of Microsoft and key figure in the microcomputer revolution of the 1970s and 1980s.

Author, entrepreneur, and investor based in San Francisco, California.

Politician who served as the 44th president of the United States from 2009 to 2017. First African-American president. Former U.S. senator and Illinois state senator. Civil rights lawyer and university lecturer.

Energy Modeler / Operations Researcher / Applied Economist, dilettante, admirer of Aristotle, Nietzsche, Whitman…