This collection consists of the annual student yearbooks at Armour Institute of Technology published between 1898 and 1940. The yearbook was known by three different titles: Integral, Senior Class Book, and The Cycle. Contents and organization of the yearbooks vary from year to year as student writers, photographers, and editors chose to include or exclude information of students by class year, members of faculty and administration, academic program, extracurricular activities, student organizations, and sports.