These two texts and student workbook for a secondary/postsecondary-level correspondence course in automatic data processing comprise one of a number of military-developed curriculum packages selected for adaptation to vocational instruction and curriculum development in a civilian setting. The purpose stated for the individualized, self-paced course is to provide general knowledge of punched card machines and automatic digital computers. It is intended for use as an introduction or sub-unit in computer programming or business and office practice courses. The course contains two lessons. The first, "Introduction to Punched Card Machines," contains four sections on general information and background, punched cards, punched card equipment, and basic considerations of report designing. The second lesson, "Introduction to Automatic Digital Computers," contains seven sections discussing classification of computers by use, computer arithmetic, functional elements of computers, classification of computers by generation, storage devices, and input-output devices. Appendixes cover references, computer arithmetic, and solutions to practical exercises. The student workbook contains review exercises and an exercise response list. Supplemental pamphlets contain the informative materials. A course examination is provided, but no answers are available. (YLB)