Interlibrary Loan (ILL) is a Libraries’ subsidized service which supports the scholarly research and curriculum needs of current Penn State faculty, staff and students. ILL supplements the services offered by the University Libraries and should be used when your needs cannot be met with the University Libraries resources. Material received through ILL is by permission of the lending library. Every effort should be taken to be good stewards of the borrowed material. ILL staff process requests daily Monday through Friday. ILL reserves the right to limit the number of requests processed per day for an individual.