This is the first in a series of annual summaries that will make available detailed profiles of the ethnic, racial, male, and female populations from the Admissions Testing Program (ATP) of the College Board. This report is the most comprehensive of all ATP summary reports: It is based on the records of all high school seniors in the United States in 1980-81 who registered for the Admissions Testing Program by March of their senior year. One of the primary benefits of summary data from the Admissions Testing Program is that they facilitate the proper interpretation and understanding of individual student data. Test scores obtained from measures such as those in the Admissions Testing Program reflect individual ability and achievement at the time the test is administered. The usefulness of these scores is dependent upon an understanding by the user of the context in which the particular test scores were earned. To interpret individual performance requires the aggregation of data across relevant educational variables for the various populations of students who register for the Admissions Testing Program. The purpose of this report, therefore, is to provide data that will facilitate this understanding of test performance. (Author/PN)