This report is the fourth of a series of reports on Education in Information Science (Documentation). The first three reports cover educational issues in general and the details of central course offerings in the UCLA Library School program. These reports are reviewed and commented upon to set the stage for the present writing which outlines the kind of courses that are needed to meet the requirements for "applied disciplines" in a systems-oriented curriculum. Three course descriptions are presented, one in each of the areas of systems analysis, statistics, and operations research. These courses emphasize the computer, not simply as a computational aid but also as a means for conceptualization of the system in the systems analysis course, for gaining insight into statistical theory in the statistics course, and for system simulation in the operations research course. Some of the difficulties the student faces in putting together a sequence of courses of this type are discussed and the possibility that the library school itself might offer such courses is investigated. (Other reports in the series are ED 039 911, 041 484, and LI 001 977.) (Author)