This manual provides a beginning approach for research libraries to better describe the use and users of their networked services. The manual also aims to increase the visibility and importance of developing such statistics and measures. Specific objectives are: to identify selected key statistics and measures that can describe use and users of electronic and networked services; to standardize procedures and definitions to collect these statistics and measures; and to increase awareness of selected issues related to collecting, analyzing, and reporting the data to produce these statistics and measures. Definition, rationale, implementation, special considerations, and related issues are described for network statistics in the following categories: patron accessible electronic resources; use of networked resources and services; expenditures for networked resources and related infrastructure; and library digitization activities. Definition, rationale, implementation, special considerations, and related issues are also described for performance measures. Appendices include a list of statistics considered and forms for data collection. (MES)