This program on instruction and programmed student texts for a secondary-postsecondary-level computer system operator course are one of a number of military-developed curriculum packages selected for adaptation to vocational instruction and curriculum development in a civilian setting. Purpose stated for the ten-lesson course is to provide the necessary information to perform all steps that are required to prepare a job for processing on a computer system. The plan of instruction gives objectives and references for these lessons: Introduction to Data Processing; Punch Card Input and Output; Input and Output Printers; Magnetic Tape Input and Output; Magnetic Disk Input and Output; Channels, Control Units and Physical Addresses; Job Control Language; Concepts in Computer Processing; Application Programs; and Data Representation. The programmed student texts for each topic present all or some of the following information for each lesson: an introduction, objectives, training aids, training material, and self-evaluation (review exercises) with answers. (YLB)