What system is commonly use by most public library?

Most public libraries commonly use Integrated Library Systems (ILS) to manage their operations, which include cataloging, circulation, and patron management. Popular ILS software includes systems like Koha, Sierra, and Alma. These systems enable libraries to streamline workflow processes and provide online access to their catalogs for patrons. Additionally, many libraries have adopted discovery layers that enhance user experience by simplifying the search for library resources.