Tryton is a three-tiers high-level general purpose application framework written in Python and use PostgreSQL as database engine. It is the core base of an Open Source ERP. It provides modularity, scalability and security. The core of Tryton provides all the necessary functionalities for a complete application framework: data persistence , users management , workflow and report engines, web services and internationalisation. Thus constituting a complete application platform which can be used for any relevant purpose.