The University of California (UC) system campuses provide various bibliographic instruction courses in behalf of undergraduates' needs. At the University of California, Berkeley, a new experimental course was offered by the library in the fall quarter 1968: "Bibliography 1-X: How to Use the University of California Library" (Bib 1). From fall 1968 through spring 1985, approximately 12,000 undergraduate students completed the course. It has been administered by the American Library Association (ALA)-accredited graduate School of Library and Information Studies, even though it is unrelated to the professional programs of librarianship and information science. Bib 1 began as a four-credit elective bibliographic instruction course offered in multiple sections each quarter, and was later changed to three credits each semester. Taught by a staff of university librarians, doctoral students, and other persons, it has attracted students from all levels, but especially lower division and transfer students. It has also attracted people outside the campus. This paper describes its history, which is unique in its combination of durability, attachment to a professional library school, volume of enrollment, relatively small classes, popularity, and acceptance in the local academic structure. (THC)