This compendium of statistical data on adult literacy assessments spanning a 75-year period is designed to serve as a concise and comprehensive reference source for policymakers, practitioners, and researchers. The introduction provides a theoretical framework for interpreting the assessments described. Summarized in Part 1 are major military and civilian assessments of adult intelligence, aptitude, and literacy, including the following: World War I Alpha and Beta tests for illiterate persons, World War II Army General Classification Test, Armed Forces Qualification Test, Armed Services Vocational Aptitude Battery, Harris surveys of adults' skills in completing various government forms, Adult Performance Level study, Young Adult Literacy Survey, and National Adult Literacy Survey. Part 2 summarizes studies of the assessment of adults' listening and reading skills, intergenerational transfer of literacy from adults to their children, and relationships of literacy to occupations and job performance. Part 3 has three sections: a summary of data on changes in literacy skills in adult literacy programs in California, Illinois, and New York; reading gain score data from various programs around the nation; and data on longitudinal changes in adults literacy skills as a function of participation in adult literacy programs for up to 3 years. The compendium includes 106 tables/figures. (MN)