A revised landmark Carnegie classification of institutions of higher education, which includes enrollment data, is presented. The classification divides institutions into 6 main categories and a number of subcategories, or 19 categories in all. For doctorate-granting institutions, the following types of institutions are distinguished: research universities I, research universities II, doctorate-granting institutions I, and doctorate-granting universities II. For comprehensive universities and colleges, two types of institutions are categorized, and for liberal arts colleges, two types of institutions are distinguished. Professional schools and other specialized institutions include theological seminaries, bible colleges, and other institutions offering degrees in religion; medical schools and medical centers; other separate health professional schools; schools of engineering and technology; schools of business and management; schools of art, music, and design; schools of law; teachers colleges; and other specialized institutions. Additional categories are 2-year colleges and institutes and institutions for nontraditional study. The institutions are listed by state and by their public or private status. Additionally, for each broad institutional category, data are provided on number of schools, the number that are public, the number that are private, and the respective enrollments. (SW)