Results of a survey of time spent by full-time science and engineering faculty on professional activity over an entire 52-week year are reported. The nationwide survey sample was designed to be statistically representative of faculty working full-time in 20 fields of science or engineering. Each surveyed person was asked to complete a log-diary for seven consecutive days. For this report, the 20 fields have been combined into 7 major field groups. The activities reported are for faculty, assistant professor or higher in rank, in doctorate-granting institutions during the 12 months beginning November 1, 1978. Results indicate, among other findings, that faculty work an average 48 hours per week and devote one-third of their time to research, one-third to instructional activities, and one-tenth to outside income-producing activities. A later complete report will include faculty at bachelor's- and master's-degree level institutions. (Author/DC)