This report, which includes 51 tables and charts, examines past, present, and future imbalances in the supply of and demand for scientists and engineers. The supply is assessed by source and by field, and compared with current and short-range demand for new graduates and for experienced scientists and engineers, including assessment of the increasing participation of women and foreign nationals in degree output. Fields considered include: engineering; physics; geosciences; chemistry; mathematics, statistics, and computer science; life sciences; and social and behavioral sciences. Surveys projecting supply/demand imbalances (for college graduates, for scientists and engineers, for professional and technical workers, in the electronics industry, and in magnetic fusion energy) over the next decade are also examined and compared. Where differences of opinion exist about future supply and utilization, attempts are made to reconcile or explain those differences of opinion, or to supply additional assessment. One conclusion reported is that although the supply of most scientists (with the exception of computer scientists) appears to have caught up with, and generally exceeded the number of job opportunities in science, actual employment continues to be low among scientists relative to employment of other groups with similar amounts of education and training. (JN)