It’s often said you could appreciate the status of the Indian Institutes of Technology (IITs) in India if you put together the status of Harvard, MIT and Princeton. The IITs—with seven campuses, in Mumbai, Kanpur, Delhi, Kharagpur, Chennai, Roorkee and Guwahati, and a few more in the pipeline—are probably the hardest school in the world to get into. Years of preparation, a six-hour entrance exam, the month-long wait for the results—after that, only the best and brightest are admitted. This is the single biggest reason for the success of IIT alumni.