A study was conducted to develop a performance-based instructional program in electronic data processing (DP) and to identify the DP tasks within various occupational titles. In order to meet these objectives, task lists from various sources were sorted and merged into a final detailed list of tasks and subtasks, under the guidance of an advisory committee, resulting in the teaching unit, "Program Writing in Ten Tasks." A pilot study was conducted and found difficulty in identifying DP tasks within various job titles unless terms being used were further clarified; an empirical computer-based method for such clarification was suggested. The products of the study were the teaching unit and a pilot study of time-spent pattern similarity coefficients among job titles. The research study resulted in better quality and more uniformity in the teaching of programming courses, and better quality and more uniformity in defining of job titles used in the data processing industry. (Appendixes contain the teaching unit and the various job titles and task analyses.) (KC)