Archival collections are available to students for use in research. Archival collections contain all sorts of materials, including (but not limited to) letters, manuscripts for published or unpublished materials, programs for events, notes for speeches, reports, official documents, etc. Users discover materials available in archives through the use of a finding aid, a kind of descriptive list of materials organized typically into boxes and folders. You can browse and search finding aids for the University of Chicago's Special Collections Research Center at https://www.lib.uchicago.edu/scrc/finding-aids/.
To locate collections of interest at other institutions, use a search engine to search "finding aid" and the name of a person, organization or other entity of interest. Finding aids include not only a description of the collection, but usually have contact information or other details about accessing the materials in the collection. Some archival collections may be partially or completely digitized, but be aware that often you will need to visit in person to use a collection.
History of Science, Medicine and Technology Librarian
Regenstein Library Room 181
Bibliographer for History
Biomedical Reference Librarian
Crerar Library Room 127
Head of Research and Instruction (Special Collections)
Regenstein Library, Special Collections Research Center, Rm 130