Designed to provide information of value in establishing a base for decision making in the Yosemite Community College District (YCCD), this assessment atlas graphically presents statistical data for the District as a whole, its two campuses, and YCCD Central Services for 1983-84. After an introduction to the use of the assessment atlas and information system, districtwide data are provided on instructional and non-instructional staff, financial expenditures, services (including method of instruction by term and sections/enrollments), facilities, and student enrollment data by age, sex, ethnicity, number of units carried, week, and time of day. The following sections present the same breakdown of information for Columbia College and its 13 departments and program areas and for Modesto Junior College and its 15 departments and program areas. Finally, information is provided on staff and finances for YCCD Central Services (i.e., the Superintendent's Office, the Assistant Superintendent for Business Services' Office, the Personnel Office, and the Resource Development Office). The report includes a glossary of terms and a bibliography of support data. (HB)