Koha is an open-source integrated library system (ILS) that provides core functionality for libraries including circulation, cataloging, acquisitions, serials management, and patron management. It was initially developed in New Zealand and is now maintained by an international team. Koha uses a dual database design with both text-based and relational database management system components to handle transaction loads. It is compliant with library standards and has web-based interfaces, making it platform independent. Koha is free and open source software distributed under the GPL license.