This document discusses the effort to find groupings for the enrollment change in California's community colleges. The new groupings can be utilized by community college strategic planners to improve programs and services based on exploring and analyzing various enrollment shifts. The information can also be used to make enrollment projections for the community colleges. The study analyzes longitudinal enrollment from 1991 to 1999 at 111 California public two-year institutions. Three dimensions were used to characterize the change in student enrollment: (1) slope of the change; (2) variability of the year-to-year change; and (3) consistency of the change across the state. Findings of the study show that enrollment stability is different at each campus. The variability in results reinforces the fact that policymakers cannot treat or consider every community college in the same manner. Some colleges have special needs and may be affected more by certain statewide regulations or standards. (Contains 14 references and several tables.) (MKF)