POS is released under the AGPL V3 (GNU Affero General Public License).
Copyright (C) 2014 Andreas Dander

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details http://www.fsf.org/licensing/licenses/agpl-3.0.html.