This document contains statistics and input-output measures for Colorado school library media centers. Statistics are provided in the three main categories of high schools, junior high/middle schools and elementary schools, and further subdivided into sections by enrollment size of schools within each category. For each section, the following tables are provided: school identification (RLSS code, address, city, zip code); respondent identification (name, title, phone, fax, e-mail); service hours per typical week; school library staffing per typical week; paid staff activities; school library usage per typical week; electronic access--number and types of computers; networked electronic access--number and types of networked computers; filtering; library media collection; and annual operating expenditures/school budget. Totals for school library media centers in Colorado (1999) and benchmarks for school library media centers in Colorado (1999) are provided. (AEF)