GRE

The Graduate Record Examination, or GRE, as it’s commonly known, is a mandatory requirement for students seeking admission in nearly all graduate schools and now a number of business schools in the US. Conducted by ETS, this standardized test is adaptive on a section-to- section basis so that a candidate’s performance in the first few sections, determines the level of difficulty of further sections. Not related to any particular subject, this standardized test measures a candidate’s analytical and reasoning abilities.

See more here…
http://www.ets.org/gre