In recent years more and more scientific journals have become digital, yet still the majority of them are also published in print. An important reason for this is that librarians seem unwilling to give up print even if their users prefer the electronic form, because a library keeps back volumes of journals to guarantee the permanent availability of the information, and librarians cannot yet guarantee permanent availability of the electronic format. Recently the Koninklijke Bibliotheek (KB)--the national library of The Netherlands--has implemented an operational electronic deposit for permanent archiving of electronic publications. The deposit system is compliant with the Open Archival Information System (OAIS) archival standard and has been developed together with IBM Global Services.Acknowledging the necessity of permanent digital archiving, Elsevier Science (ES), a major science publisher, has recently signed a unique archiving agreement with the KB. ES will deposit all its electronic publications at the KB for permanent archiving and access.