The Heritage of the Printed Book Database, formerly the Hand Press Book Database, as of 2014 contained almost 5 million entries for books printed during the hand press era, from the introduction of printing technology to Europe around 1450 to the mid-19th century, with descriptions facilitating comparison of variant versions. At that time 41 institutions had contributed entries, which are primarily based on examination of the item rather than on retroconversion of earlier bibliographic entries. The database is continuously updated, primarily by member institutions. The HPB database was hosted by the US-based OCLC from September 2007 until 2013, and uses OCLC's FirstSearch and Connexion software. Since September 2013 it has been hosted by the German. Access is limited to CERL member institutions and licencees.
CERL Thesaurus
The CERL Thesaurus, managed by the Data Conversion Group in Göttingen, indexes locations, printers, publishers and authors for works printed between c. 1450 and 1850, and thus serves in association with the Integrated Authority File to cross-reference variant names in printings and catalogues. It is automatically updated with the Material Evidence in Incunabula database and offers links to information on provenance provided by CERL member institutions, reflecting now dispersed collections, and also includes digitised material such as images of printer's marks collected by Vindel, Ronald McKerrow and Philippe Renouard and of watermarks. Access to the thesaurus is free.
CERL Portal
The CERL Portal was developed by the Electronic Publishing Centre of the Uppsala University Library after the completion of the CERL Manuscripts Project. It permits combined searches of both manuscripts and printed books, in manuscript databases, the HPB and additional relevant online databases such as the English Short-Title Catalogue and photograph databases. Access to the portal is free.
Material Evidence in Incunabula
Material Evidence in Incunabula is a database of 15th-century printed works that draws on the Incunabula Short Title Catalogue of the British Library and combines them with data about individual copies. Its development was initially funded by the British Academy. Access to the database is free.
Member institutions
the consortium has 272 members, primarily in Europe but also in Central and South America and the US. Of these, single members and special members have one vote at the annual general meeting; groups of not more than 16 libraries share one vote; and cluster members associated with a single member may not vote.