Research Experiences for Undergraduates (REU) is a National Science Foundation sponsored program that supports the work of undergraduates doing research on an ongoing research project of a mentoring faculty member. There are usually a few CS openings each year. No academic credit is given for an REU but the REU completes the capstone requirement. Students who also wish to earn academic credit for the REU should enroll in CS 401.
Professor Herlocker has an REU information page at: