Credit course registration characteristics for the extension classes program, Continuing Education and Extension, University of Minnesota, are presented and provide a basis for future program planning and evaluation. Based on 1974-75 data, the report focuses on the Twin Cities, Duluth, Morris, and Rochester locations. The text discusses: courses, sections, and registrations; comparison of registration by location and field for 1973-74 and 1974-75; average credit per individual registrant; credit hours by field; full year equivalent; and, context and qualifications for planning. Ten tables provide data and supplement the text. The detailed record of registrations, number of courses, and number of students translated into full year equivalent numbers reveals the substantial dimensions of this program. The majority of extension classes students are under 30 years of age, and long range planning should take cognizance of this shrinking population base. (LH)