Columbia has three official undergraduate colleges: Columbia College (CC), the liberal arts college offering the Bachelor of Arts degree; the Fu Foundation School of Engineering and Applied Science (also known as SEAS or Columbia Engineering), the engineering and applied science school offering the Bachelor of Science degree; and The School of General Studies (GS), the liberal arts college offering the Bachelor of Arts degree to non-traditional students undertaking full- or part-time study. Barnard College is a women's liberal arts college and an academic affiliate in which students receive a Bachelor of Arts degree from Columbia University. Their degrees are signed by the Presidents of Columbia University and Barnard College. Barnard students are also eligible to cross-register classes that are available through the Barnard Catalogue and alumnae can join the Columbia Alumni Association.