[Koha] Inter Library Loan Module

To whom it may concern within the Koha community, I looked through the documentation for Koha ( http://manual.koha-community.org/3.8/en/index.html) and could not find an interlibrary loan module for version 3.8. I assume that libraries using Koha will need to consider integrating outside software for interlibrary loan service. Is my assumption correct? Any information will be helpful. Thank you, Joseph A. Pruett