Research Experiences for Undergraduates (or REUs) are competitive summer research programs in the United States for undergraduates studying science, engineering, or mathematics. Such programs usually focus on targeting women and underrepresented minorities (e.g., African Americans, Mexican Americans, Native Americans, and mainland Puerto Ricans).
The programs are sponsored by the National Science Foundation and are hosted in various universities. They are among the most prestigious summer programs in which an undergraduate can participate. Individual REUs tend to be specialized in a particular field of science, such as mathematics, physics, chemistry, biology, psychology, and computer science.
For a complete list of all REUs available, visit the National Science Foundation website.