Reference collection on science, technology, commerce, patents, trade marks and design. Part of the British Library. Collection of patents, 25000 journals, books, directories, market information. Has a public access CDROM collection. Catalogue of post 1974 accessions, conference holding and complete periodicals holdings available on Blaise (see separate entry) and on BL OPAC (see main British Library entry). Formerly known as SRIS. See also separate entry on their Environmental Information Service (EIS).