The U. S. Environmental Protection Agency (EPA) Library System consists of 28 libraries. The libraries are supported by computer systems covering journal and book holdings, journal check-in, circulation, document control, EPA reports, international exchange items, and specialized subject area collections. (Author)

Reviews recent progress in the development and use of online retrieval services, integrated online library support software, and communication and networking standards. A description is provided of a prototype system that would combine a gateway capability with a locally managed facility to meet a library's total needs. (EM)