The document discusses open-source and proprietary library catalog software. It defines open-source software and lists some examples of open-source library catalog software like Koha, Evergreen, phpMyLibrary, and OpenBiblio. The document notes that open-source software is free but requires technical expertise for support, while proprietary software has costs for licensing but includes training and support. When choosing, libraries should consider needs, available support resources, and total costs of ownership.