GRADUATE RECORD EXAMINATION (GRE) is an aptitude test conducted by Education Test Service, Princeton, New Jersey. A GRE score is a mandatory requirement for admission to most universities in USA for their graduate (MS and PhD) programs. Some universities in Singapore (NTU, NUS) and some in Canada also require a GRE score. In the last few years, top business schools (such as Harvard, Wharton, INSEAD etc) have also started accepting GRE scores for admissions to their MBA programs. The complete list of business schools accepting GRE is available here
.There are over 200 universities in USA. Finding admission in the top 20 ranking universities can be a matter of great pride. However, one shouldn’t go by rankings alone but also consider the program specialization and the strength of the faculty in your area of interest. After all, this is where you will spend the best years of your life - studying, researching and forming the basis of the rest of your professional life.