The first nationwide survey of public school districts' uses of computers, this study summarizes the responses of 1,484 districts out of a national sample of 3,497 school systems. Presented in 25 tables, the data are classified by district enrollment size and expenditure per pupil. The variables covered, besides computer uses, include type of access to computers (computer ownership or contracted services), computer size (mainframe, mini, or micro), manufacturer's name, year in which computer use was introduced into the district, participation in computer networks, benefits and problems related to computer use, and factors judged most important for successful use of computers. Computer usage variables include the following: instruction, student records (academic and nonacademic), scheduling, personnel matters, business, operations and maintenance, transportation, cafeteria functions, library, public relations and information, cocurricular activities (chiefly sports), budget and enrollment projections, and district censuses. For each type of use, the report presents a brief discussion, a summary table, and profiles of districts' applications; each application provides the district name, specific purpose, description of the use, and relevant additional information. (RW)