An outline is proposed for a library school course in data processing for libraries that is different from other such courses in that it emphasizes the operations of the computer itself over the study of library computer systems. The course begins with a study of computer hardware then moves to the teaching of assembly language using the MIX language as an example. COBOL is then taught as an example of higher level programing languages. In the final segment of the course, actual library systems are studied. This course description includes a list of appropriate texts and suggested study projects. (SL)