This paper describes the various ways in which the SAT has evolved since its introduction in 1926. Some of the modifications have involved changes in the types of questions used to measure verbal and mathematical skills. Other modifications focused on liberalizing time limits to ensure that speed of responding to questions has minimal effect on performance. There were changes in the actual administration of the test, such as allowing students to use calculators on the math sections. Still other revisions have stemmed from a concern that certain types of questions might be more susceptible to pretest coaching. All of these changes were intended to update the SAT so that it remains fair for an increasingly diverse group of test-takers, while at the same time enhancing its effectiveness as an admission tool.