GRE is the entrance exam for which degree?

The GRE, or Graduate Record Examinations, is a test for people planning to apply to graduate school after college, to obtain either a Master's degree or PhD in any of a number of different fields. The GRE is used for most non-professional post-grad degrees. Other tests include the MCAT for prospective medical students and the LSAT for future law students. These measure different types of competencies.