The Board of Trustee Reports (record series 1/1/802) from 1867-1996 are accessible at the UIHistories Project Digital Repository. Board of Trustees Minutes from July 2008-present are available through the Board of Trustees website.
The Illio Yearbook (record series 41/8/805) can be searched via the Internet Archive from 1895-2000. It can also be accessed by searching for the Illio on the Archives website or visiting www.library.illinois.edu/imay for years 1970-89.
Pocket Facts (record series 39/1/806) is an informational pamphlet published by the University Administration and gives a brief summary of information about the three University of Illinois campuses.
U of I Student Life and Culture
The Student Life & Culture Archives at the University have created and compiled several useful resources including a timeline of University history, oral history projects, Greek housing and fraternity chapter histories, and several research guides that can point users towards resources built around a theme.
A strong resource for University history, including short histories of all buildings, searchable and browsable Board of Trustees Minutes, digitized maps, and a lot more.