opsi is an open source device management system to manage heterogeneous environments. It enables the deployment and configuration of software and OS on Windows and Linux computers. opsi is a powerful tool that can manage clients, starting with a dozen, up to several thousands of clients over multiple locations. The integrated inventory gives a detailed overview of the hard- and software. This makes opsi the ideal tool for every system administrator. opsi is deployed across all sectors in the fields of education, business and public administration.