entrepreneurs backed by venture capital. Library system UCLA's library system has over nine million books and 70,000 serials spread over twelve libraries and eleven other archives, reading rooms, and research centers. It is the United States' 12th largest library in number of volumes. The first library, University Library (presently Powell Library), was founded in 1884. In 1910, Elizabeth Fargo became the university's first librarian. Lawrence Powell became librarian in 1944, and began a series of system overhauls and modifications, and in 1959, was named Dean of the School of Library Service. More libraries were added as previous ones filled. Page Ackerman became University Librarian in 1973 and was the nation's first female librarian of a system as large and complex as UCLA's. She oversaw the first coordinations between other UC schools, and formed a new administrative network that is still in use today. Since her retirement, the system has seen steady growth and improvement under various librarians. The present University Librarian is Virginia Steel, who took office on July 15, 2013. Medical school admissions According to the Association of American Medical Colleges (AAMC), UCLA supplies the most undergraduate applicants to U.S. medical schools among all American universities. In 2015, UCLA supplied 961 medical school applicants, followed by UC Berkeley with 819 and the University of Florida with 802. Among first-time medical school applicants who received their bachelor's degree from UCLA in 2014, 51% were admitted to at least one U.S. medical school. Admissions Undergraduate U.S. News & World Report rates UCLA "Most Selective" and The Princeton Review rates its admissions selectivity of 98 out of 99. 149,815 prospective freshmen applied for Fall 2021, the most of any four-year university in the United States. Admission rates vary according to the residency of applicants. For Fall 2019, California residents had an admission rate of 12.0%, while out-of-state U.S. residents had an admission rate of 16.4% and internationals had an admission rate of 8.4%. UCLA's overall freshman admit rate for the Fall 2019 term was 12.3%. As of 2020, the basis for selection at UCLA includes several academic and nonacademic factors. Those considered "very important" are all academic; they are rigor of secondary school record, academic GPA, standardized test scores, and application essay(s). Those considered "important" are talent/ability, character/personal qualities, volunteer work, work experience, and extracurricular activities. Factors that are not considered at all include class rank, interviews, alumni relation, and racial/ethnic status.