This chapter of "Principles of School Business Management" provides an overview of the role of computers--and microcomputers in particular--in the school business management process. The chapter opens with a background discussion of the management information system (MIS) concept in general. This topic is examined in terms of the characteristics of and interrelationships among three critical concepts: management, information, and systems. The chapter then turns to the impact of the microcomputer-based system, the peripheral devices, the characteristics and types of software available, and typical program features. The chapter next addresses human factors involved in implementing MIS. These factors include (1) overcoming resistance to implementation; (2) providing training for efficient use of MIS; and (3) managing the MIS operation. Specific applications of a micromputer-based MIS are the chapter's last major topic. A chart diagrams the relationships among typical uses in a school district. Seven sample reports that can be generated through the use of such a system are displayed. (PGD)