The 1990-91 Association of Research Libraries (ARL) preservation questionnaire, the results of which are reported in this volume, was designed to yield statistical information on the current level of preservation efforts in research libraries and on the key organizational, functional, and fiscal components that characterize preservation programs. The data are divided into three parts. In the first part, summary data tables display the aggregated statistics describing the current level of preservation efforts in ARL libraries. The second part presents an analysis of the core data for all reporting libraries. The analysis includes data from all reporting university and nonuniversity libraries, and the key organizational, functional and fiscal components that characterize preservation programs in ARL libraries and that distinguish between program levels are analyzed. Part 3 provides statistical measures by the size of the collection. A copy of the 1990-91 questionnaire and a section of footnotes to the ARL Preservation Statistics for each member institution conclude the report. (Author/KRN)