Smaller in scope than majors or minors, certificates usually are offered in areas of concentration for which no major or minor exists and are comprised of at least 4 units of coursework that are not also applied to a major or a minor. Certificates are conferred concurrent with the student's undergraduate degree. They do not appear on the diploma, but are noted on the transcript.
Most undergraduate schools and the Kellogg School of Management offer certificates for undergraduate students. See the list of offerings on the left in the web navigation and in subsequent pages in the PDF.