Enhancing Caltech’s reach and influence by disseminating published research, theses, technical reports, research data and software through the Library’s digital repositories.

The Caltech Collection of Open Digital Archives (CODA) contain Caltech's institutional collections for faculty research publications and other content supporting the mission of the Institute, and is hosted and managed by the Caltech Library.  Its mission is to collect, manage, preserve and provide global access over time to the scholarly output of the Institute, the publications of campus units, and its history. CODA as a whole has been active since 2001. CaltechAUTHORS and CaltechTHESIS are its largest and most dynamic repositories.

The repositories are compliant with the Open Access Initiative-Metadata Harvesting Protocol (OAI-PMH), which makes them visible in “deep web” search engines (e.g. OAIster, D9). In addition to accessing the archives directly from the Caltech CODA website, the major general web search engines (Google Scholar, Scopus, and MSN Search, among others) routinely index the sites.

  • Main Repositories 
    • CaltechAUTHORS is the main repository, holding research publications by Caltech authors. It contains mainly published articles, but also books, book chapters, technical reports, conference papers, patents and more, and is updated continuously as departmental and library staff add available and recently published documents.
      • We encourage self-deposits by Caltech faculty and staff. Basic entries with attached content files are accepted, and library staff enhance the records as needed. A libguide, workshops and direct assistance are also offered through the library.
      • Previously separate technical report collections have been merged into CaltechAUTHORS. Browse the Collections in CaltechAUTHORS to find out more.
    • CaltechTHESIS includes all Caltech theses written since 2002, as well as digitized copies of earlier theses. This collection continues to grow as we add both new and older theses.
    • CaltechCampusPubs contains general publications by Caltech faculty, staff, and students, that are of interest to the campus community as a whole. These include regularly published titles such as the Caltech Catalog (course catalog), the California Tech (student newspaper) and the Big T (yearbook). The repository is updated continuously as departments and library staff add both recently published and digitized older documents.
      • If you are a member of the Caltech community and would like to have your documents added to this repository, please contact the library.
    • CaltechDATA is the newest repository, which stores data created by Caltech researchers and shares their results with the world.  The self-service repository enables researchers to upload research data, link data with their publications, and assign a permanent DOI so that others can reference the data set.  The repository can link with a Github account to automatically preserve software releases.  Find more information about the repository and look at frequently asked questions.  
  • Caltech Archives Repositories 
    • Photographs and Images Collection
      • The Archives maintains an online database of more than ten thousand images from our collections. Images relate to Caltech but also to the history of science in general, and they represent people, places, fine art, rare book illustrations, and historic instruments.
    • The Paul MacCready Collection
      • Documents most aspects of MacCready's personality and career through a diverse array of documents, media, objects, manuscripts and printed material spanning over seventy years (ca. 1930-2002). Especially prevalent within the collection are papers and ephemera from 1977 to 1985 during which time MacCready was working on his human-powered airplanes, the Gossamer Condor and Gossamer Albatross. The papers also document his work in alternative energy solutions.
    • Donald A. Glaser Papers
      • ​​Donald. A. Glaser (1926-2013) completed his PhD in physics at Caltech in 1950 and was awarded the Nobel Prize in Physics in 1960 for his invention of the bubble chamber. His scientific work transitioned then to molecular biology and later to neuroscience, leading to significant contributions in both fields. The Glaser Digital Collection unites two physical collections owned by the University of California, Berkeley and Caltech. It is extremely rich and significant and includes papers, diaries, notebooks, many photos and slides.
    • George E. Hale Papers
      • George E. Hale (1868-1938) was an influential astrophysicist and scientific administrator. He quickly established a distinguished scientific reputation for his invention of the spectroheliograph, then made important contributions to the study of solar phenomena. He was the leading figure in the founding of the Kenwood, Mount Wilson and Palomar Observatories as well as the California institute of Technology, Huntington Library and the National Research Council.
    • CaltechOH
      • The Caltech Archives Oral History Project began in 1978 for the purpose of recording the personal memoirs of the distinguished scientists, teachers and administrators of the Institute. To date, approximately 170 interviews have been completed and most are open to readers in transcript form. Oral Histories Online, begun in the fall of 2002, brings selected interviews to the public in digital form, chosen from the fields of biology and environmental science.
    • CaltechLabNotes
      • Lab Notes Online presents historic scientific data from the Caltech Archives' collections in digital facsimile. Beginning in the fall of 2008, the first publication in the series is Robert A. Millikan's notebooks for his oil drop experiments to measure the charge of the electron, dating from October 1911 to April 1912. Other laboratory, field, or research notes will be added to the archive over time.
  • Caltech Magazines
    • The Caltech Magazine, (2017+) formerly known as the Engineering & Science magazine (1937-2016), and produced by the Caltech Office of Strategic Communications, presents scientifically literate audience a lively picture of the intellectual life and research activities at Caltech and promotes interest in science and scientific issues. It is published several times a year. Both current and older issues are hosted on the CaltechES repository.
    • ENGenious is a publication for alumni and friends of the Division of Engineering and Applied Science of the California Institute of Technology. Both current and older issues are hosted on the CaltechCampusPubs repository.
  • Caltech-Hosted Conferences
    • CaltechCONF contains papers delivered at several conferences hosted at Caltech. We have merged multiple separate Caltech-hosted conference collections into CaltechCONF. Browse the Conferences in CaltechCONF to find out more.