Tango is an Open Source solution for SCADA and DCS. Open Source means you get all the source code under an Open Source free licence (LGPL and GPL). Supervisory Control and Data Acquisition (SCADA) systems are typically industrial type systems using standard hardware. Distributed Control Systems (DCS) are more flexible control systems used in more complex environments. Sardana is a good example of a Tango based Beamline SCADA.
The Tango community meetings take place each year alternately in one of the 15 institutes members of the Tango consortium.
They group together all the members of the community with the developers. They present the last technical progress and agree on the development strategy and roadmap