As part of the Maryland Longitudinal Study of 772 students entering the University of Maryland, College Park (UMCP) in 1980, the use and ratings of UMCP campus services by students in the third year of the study were analyzed. Findings included the following: (1) Representative Group (containing members of all ethnic groups) and Black Group participants made similar use of most services, although black students made greater use of Residence Hall staff, the Health Center, and the Financial Aid Office; (2) the most frequently used services by both groups included Stamp Student Union, Hornbake Undergraduate Library, the University Book Center, the Registrations Office, Dining Services and the Health Center; and some of those services were among those with the highest ratings; (3) females in both groups tended to use many of the services more than males; (4) services with the least positive ratings included Motor Vehicle Administration, Judicial Programs, Dining Services, the Registrations Office and the Financial Aid Office; (5) in the Representative Group, females rated five services significantly more positively than did males, but no gender differences in ratings were found for the Black Group; (6) in the Black group, on-campus residents were more likely than commuters to use campus minority services; and (7) residential status appeared to have little effect on ratings of services among either group. Implications for the improvement of campus services are discussed. Data are reported in two tables and four appendices. Contains 4 references. (KM)