Rapid SCADA software is released under Apache License 2.0. The formal terms of the license can be found at http://www.apache.org/licenses/LICENSE-2.0
For additional details see Wikipedia at http://en.wikipedia.org/wiki/Apache_License
Important Note: Some of Rapid SCADA modules can be released under other types of licenses including proprietary. In this case, the actual text of license is distributed within the module installation package.