This report examines the representation of women and minorities in the science, mathematics, and engineering fields and addresses the sources of current trends and issues for the future. The first section, "Demographics and the Science and Engineering Talent Pool", addresses the expected shortfall of more that 400,000 science and engineering personnel by the year 2000 and the general demographic changes eroding the science and engineering workforce. A section titled "The Topography of the Educational Pipeline for Minority Students" looks at school systems and curricula, teacher perceptions of students, student attitudes, and the performance of minority students in the precollege curriculum. The third section, "Enrollment in Science and Engineering Minority Groups: Trends by Gender and Ethnicity", discusses Blacks, Hispanics, Native Americans, and women. The following section, "Participation of Minorities in Higher Education", describes factors affecting participation, shortages of minority faculty and administrators, the historically Black institutions, the major research universities, and liberal and community colleges. A section titled "Programs and Strategies for Minority Student Enrichment" covers federal and state involvement and privately sponsored programs. A final section outlines policy issues. Statistical data are presented in 8 tables and 3 graphs and 205 references are provided. (JB)