Catalogs and Google Scholar
Oskicat. UC Berkeley libraries catalog. Includes records for most UCB library materials, including books, e-books, journal and e-journal titles, films and videos, maps, archival materials, and much more. See also the Quick Guide to Oskicat and Oskicat Tutorial.
Melvyl. Catalog for all UC Campus libraries, including selected libraries on campus not in Oskicat, e.g. the Boalt Law Library. Why use Melvyl? It includes thousands of scholarly journal articles and links to WorldCat, which gets you into the collections of libraries around the world
Google Scholar. It automatically connects you via UC eLinks to articles and other content licenses by the UC libraries.