Question: INSPIRE-HEP, an open access digital library for the field of high energy physics developed by Stanford University, has been the main literature database for universities, colleges, and research institutions since when?
Context: James E. Brau (born 1946) is an American physicist at the University of Oregon (UO) who conducts research on elementary particles and fields.  He founded the Oregon experimental high energy physics group in 1988 and served as director of the UO Center for High Energy Physics from 1997–2016.  Prior to joining the Oregon faculty, he served in the Air Force and held positions at the Stanford Linear Accelerator Center and the University of Tennessee.  He is a fellow of both the American Physical Society and also the American Association for the Advancement of Science.  In 2006 he was appointed the Philip H. Knight Professor of Natural Science, an endowed professorship. Timarit.is (also known as Tidarrit.fo and Aviisitoqqat.gl) is an open access digital library run by the National and University Library of Iceland which hosts digital editions of newspapers and magazines published in Iceland, Faroe Islands and Greenland as well as publications in their languages elsewhere, such as Canada which had a large influx of Icelanders in the late 19th and early 20th centuries.  The project was initially sponsored by the West Nordic Council and launched its web interface under the title VESTNORD in 2002.  The web interface has since undergone two major revisions, in 2003 and 2008.  With the last revision a decision was made to gradually convert images from the DjVu image format to the more common PDF.  Hence, part of the collection can be viewed with the DjVu plugin and part with a PDF reader. INSPIRE-HEP is an open access digital library for the field of high energy physics (HEP).  It is the successor of the Stanford Physics Information Retrieval System (SPIRES) database, the main literature database for high energy physics since the 1970s. The Tan Sri Dr. Abdullah Sanusi Digital Library or TSDAS Digital Library is a digital library housed at Open University Malaysia, Kuala Lumpur, Malaysia.  Although it is known as digital library, the library holds a wide range of resources in both online and print format.  Currently, there are close to 30,000 volumes of printed books in the library system.  The library subscribes to 37 online databases comprising e-books, e-journals, e-theses and more.  To date, there are more than 82,000 e-books and 32,000 e-journal titles, about 930,000 e-thesis titles, three newspaper databases and one local legal act database covering all courses offered in OUM. CLHEP (short for "A Class Library for High Energy Physics") is a C++ library that provides utility classes for general numerical programming, vector arithmetic, geometry, pseudorandom number generation, and linear algebra, specifically targeted for high energy physics simulation and analysis software.  The project is hosted by CERN and currently managed by a collaboration of researchers from CERN and other physics research laboratories and academic institutions.  According to the project's website, CLHEP is in maintenance mode (accepting bug fixes but no further development is expected). Carlos Wagner is a particle physicist.  He specializes in theoretical physics, elementary particles and supersymmetric theories.  He currently works for the High Energy Physics (HEP) division of the Argonne National Laboratory and is also a professor at the Physics Department of the University of Chicago, Enrico Fermi Institute, and the Kavli Institute for Cosmological Physics, University of Chicago.  He also functions as the Head of the ANL High Energy Physics Theory Group. The Journal of High Energy Physics is a peer-reviewed scientific journal covering the field of high energy physics.  It is published by Springer Science+Business Media on behalf of the International School for Advanced Studies.  The journal used to publish a conference proceedings supplement, which has been incorporated into the "Proceedings of Science".  The journal is part of the SCOAP initiative. The Stanford Physics Information Retrieval System (SPIRES) is a database management system developed by Stanford University.  It is used by universities, colleges and research institutions.  The first website in North America was created to allow remote users access to its database. The Stanford Digital Library Project (SDLP) (also called The Stanford Integrated Digital Library Project and The Stanford Digital Library Technologies Project) was a research program run by Hector Garcia-Molina, Terry Winograd, Dan Boneh, and Andreas Paepcke at Stanford University in the mid-1990s to 2004.  The primary goal of the SDLP project was to "provide an infrastructure that affords interoperability among heterogeneous, autonomous digital library services."  and described elsewhere as "to develop the enabling technologies for a single, integrated and "universal" library, proving uniform access to the large number of emerging networked information sources and collections." Chinese Physics C (CPC) is a monthly peer-reviewed scientific journal published by the Chinese Physical Society along with the Institute of High Energy Physics, Chinese Academy of Sciences.  CPC is hosted online by IOP Publishing.  It reports on research into the theory, experiment and applications of particle physics, nuclear physics and astrophysics.  The journal was established in 1977 as High Energy Physics and Nuclear Physics, and renamed to its present title in 2008.  Its current impact factor is 5.084 (2016).
Answer: 1970s