The Robert L. Forward papers contain official documents, literary works, correspondence, memorabilia, scientific research, and the personal library of Dr. Robert L. Forward, an American physicist and prolific science-fiction author. The bulk of the papers pertain to Dr. Forward's scientific and literary careers, though material regarding personal accomplishments and activities is also included.

The collection consists of business materials related to various citrus manufacturing companies in the Riverside, California area owned or run by George H. Gobruegge. Companies represented in the collection include Gobruegge, Klein & Co., California Citrus Cash Co-Operative, Fay Fruit Co., and Gobruegge & Hirst.

The collection consists of materials related to the International Relations Council of the City of Riverside, a non-profit organization dedicated to facilitating "citizen diplomacy" through maintaining Riverside's nine Sister City relationships. Materials in the collection include photographs, slides, business records, VHS tapes, and other items documenting relations and activities with Riverside's Sister Cities.

The collection consists of operational documents, pamphlets, reports, and other materials produced and collected by the Riverside Coalition for Police Accountability (RCPA), a grassroots organization dedicated to improving relations between the Riverside Police Department and the local community by advocating for public oversight and review of police policies, procedures, and actions.

The Sunkist Growers Inc. records consists mostly of agreements between various growers and the Fruit Growers Supply Company and the Exchange By-Products Company, which were parts of the organization that provided wholesale supplies and developed markets for citrus by-products like oil and citric acid. The collection also includes brochures, photographs, and a photo album including research information from the University of California Citrus Experiment Station.

The collection consists of the business ledger of the West India Plantations, a company founded and ran in part by Frederick O. Popenoe, to import, grow and sell agricultural goods including date palms. Materials in the ledger cover the business records from the entirety of the Pasadena, California based company's existence from 1912-1917 and include their Articles of Incorporation, bylaws, meeting minutes, resolutions, accounting records, and shareholder information.