Apart from OPACplus, you may search the card catalogues at the University Library (for pre-1982/86 books) and the Online Catalogue of the Stadtbücherei Erlangen (Erlangen Public Library)
OPACplus is a library portal. Its core feature is the University Library's online catalogue. Search may be extended to further catalogues.
Depending on search results, SFX offers extended services such as more search options, links to full texts on the web, interlibrary loan, or the document delivery service Subito
The Bavarian library portal Gateway Bayern offers a gateway to the Bavarian Union Catalogue, more online catalogues, as well as literature databases. It provides further search options, access to interlibrary loan, and the document delivery service Subito.
Karlsruher virtueller Katalog (KVK)
Karlsruher Virtueller Katalog
The meta-catalogue Karlsruhe Virtuelle Katalog (KVK) provides access to the data of more than 500 million books and journals listed on national as well as international library and booktrade catalogues. No ordering function.