Lancaster has been looking forward to paperless scholarly communication since 1976 but more recently the terms "virtual library", "digital library" and "hybrid library" have been coined, and we can begin to conceive of a new library-concept within not too many generations. Lancaster (1994) has also speculated on what will be meant by collection development by the year 2025, and has cited Dowlin who wrote of the need to move the library from a "fortress" model to an "information pipeline" model. Any such model would have to embrace the electronic forms of today's paper-based publications.