This report compiles 1977-78 enrollment information for 1,006 two-year postsecondary institutions, including accredited junior and community colleges, multipurpose, technical, and/or vocational schools and institutes, university branch campuses, and proprietary schools. During 1977-78, total enrollment for reporting institutions was 3,336,413, a rise of 2.7% over the previous year. Full-time enrollment declined 1.8%, while part-time enrollment increased sharply from 3.7% in 1976-77 to 6.2% in 1977-78. Full-time students represented 41.6% of the collegiate headcount and 68.1% of the full-time equivalent enrollment. Female enrollment continued to grow from 48.6% in 1976-77 to 51.5% in 1977-78. Six tables, constituting the bulk of the report, break down enrollment data by institution, institution type (public, church-affiliated, proprietary, or independent), geographical region, state, sex, full-time student enrollment, and full-time and total teaching staff. The introductory narrative summarizes enrollment trends and provides a brief look at the future. (TR)