From humble beginnings as a small technological institute that opened in 1888, Georgia Tech has become one of the nation's top-10-ranked public universities, according to U.S. News & World Report rankings, and is renowned throughout the world for its excellence in technological education and research. Famous Georgia Institute of Technology alumni include Jimmy Carter, G. Wayne Clough, Jeff Foxworthy, Sam Nunn, Randolph Scott, and Leonard Wood, along with many famous athletes. Georgia Tech has won four national college football championships, the first in 1917 under the legendary coach John Heisman. Today, Georgia Tech has a student body of more than 29,000 at the undergraduate and graduate levels and more than 155,000 living alumni. The institute has an annual economic impact of about $3 billion upon Georgia's economy.