"In brief, Princeton is a wealthy, private, research university of high standing with a long history. It is located in a largely affluent suburban community that is home to a number of highly educated people associated with knowledge-intensive institutions such as ETS (Educational Testing Service) and the Institute for Advanced Study, as well as Princeton, Rutgers, and other colleges and secondary schools. The university is residential, operates at a relatively small scale, and is highly selective at both undergraduate and graduate levels. The undergraduate college was all male until it became coeducational in 1969—a change that occurred a few years earlier at the graduate level. It has a famously loyal (some would say "fanatically loyal") alumni body."