This document, a byproduct of the National Longitudinal Study of the High School Class of 1972, provides data on what postsecondary courses are actually taken both by school completers and school leavers, based on analysis of postsecondary transcripts from 1972 to 1984 of 12,600 students graduating from high school in 1972. Also presented is a revised Classification of Instructional Programs (CIP) coding system based on recoding the 485,000 instances of course-taking in the sample. The tentative new taxonomy and decision rules were reviewed by faculties in the appropriate fields prior to final application. Data from the study are presented in tabular form and include the following: percentage of students completing undergraduate courses in 1,037 course categories; percentage of students completing undergraduate courses in 103 aggregate course categories; and distribution of all completed courses by type of institution. Additional data presented cover: basic demography and high school backgrounds of students; highest degree earned; college scholarship support; basic demography of 2/4-year and transfer attendance patterns; date of bachelor's degrees; date of associate's degrees; course of study and degrees earned beyond the bachelor's; and college experiences/attainments. (DB)