The College of Extended Studies, operated by the San Diego State University, offers a variety of learning classes, seminars and certificate programs and serves students in San Diego community. It features career advancement courses in the areas of management, leadership and quality improvement. The college offers self-enrichment courses in the fields of astronomy and Web design. Additionally, the College of Extended Studies features more than 30 certificate programs and online courses. It operates the American Language Institute and the Osher Lifelong Learning Institute. The college runs certificates, extension and professional development departments. It offers certificate programs in the areas of accounting, applied linguistics, client server technology, economic development, computational science, construction, contract management, environmental studies, gerontology and human resource management. The College of Extended Studies is located in San Diego.