This Users Manual is the supporting documentation for the Public Use Data File from the National Longitudinal Study of the High School Class of 1972 (NLS). The data file contains certain merged data from the base year (1972), and first, second, and third follow-up NLS surveys for 22,652 cases. This volume contains only appendices K through Q, as follows: (K) Frequency Distributions for Base Year, First, Second, and Third Follow-up Questionnaire Data; (L) Subject Keyword Index; (M) Variable List with Tape Locations; (N) Specification and Use of Planning and Activity State Variables; (O) Composite Score Analysis: Ability Index, Socioeconomic Status Index, Some Psychological and Educational Construct Scales; (P) Bibliography of Papers Relating to Estimation of Variances of Survey Data and Examples of Estimation in NLS Analysis; and (Q) Alphabetic Responses for Third Follow-Up Questions. (Appendices A through J are contained in TM 007 563). (Author/CTM)