This document provides an overview of the open source integrated library system (ILS) called Koha. It discusses Koha's history as the first open source ILS, which was developed in New Zealand in 2000. The document outlines Koha's main features, which include modules for acquisitions, cataloging, circulation, and more. Statistics are provided on the largest Koha installations and number of translated interfaces. Requirements to run Koha are also covered. The document encourages attendees to learn, deploy, and help spread adoption of Koha.