Ivaylo Georgiev Kalfin (Bulgarian: Ивайло Георгиев Калфин, born 30 May 1964) is a Bulgarian politician. A three-term deputy, he was Minister of Foreign Affairs of Bulgaria and Deputy Prime Minister from 2005 to 2009. He is currently a member of European Parliament.

Born in Sofia, Kalfin received his higher education at the University of National and World Economy (1983–1988) and the Loughborough University (1998–1999). His foreign language skills include English, French, Russian and Spanish. He is married and has a daughter.

Kalfin founded the Social Democrats National Movement and served as the deputy president of the Common Parliamentary Committee Bulgaria-European Union between 1995 and 1998. A deputy in the 37th (1994-1997), 38th (2000-2001) and 40th (since 2005) National Assembly of Bulgaria, Kalfin has been part of the Bulgarian National Bank's Consultative Council since 2004. He observed the elections in Kosovo in 2001 and 2004 as part of Organization for Security and Co-operation in Europe missions in the region and has also worked as a senior university lecturer and manager in several consulting companies.

William Henry "Bill" Gates III (born October 28, 1955 in Seattle, Washington) is an American business magnate, computer programmer and philanthropist. Gates is the former chief executive officer (CEO) and current chairman of Microsoft, the world’s largest personal-computer software company he co-founded with Paul Allen. He is consistently ranked among the world's wealthiest people and was the wealthiest overall from 1995 to 2009, excluding 2008, when he was ranked third; in 2011 he was the wealthiest American and the second wealthiest person. During his career at Microsoft, Gates held the positions of CEO and chief software architect, and remains the largest individual shareholder, with 6.4 percent of the common stock. He has also authored or co-authored several books.

Gates is one of the best-known entrepreneurs of the personal computer revolution. Gates has been criticized for his business tactics, which have been considered anti-competitive, an opinion which has in some cases been upheld by the courts. In the later stages of his career, Gates has pursued a number of philanthropic endeavors, donating large amounts of money to various charitable organizations and scientific research programs through the Bill & Melinda Gates Foundation, established in 2000.