QtScripts a scripting engine that has been part of the Qt toolkit since version 4.3.0.
The scripting language is based on the ECMAScript standard. The library contains the engine, bindings to the standard Qt classes, and a C++ API for evaluating QtScript code and exposing custom QObject-derived C++ classes to QtScript.
Qt Script for Applications (QSA)
An earlier and unrelated scripting engine, called Qt Script for Applications (QSA), was shipped by Trolltech as a separate Qt-based library, dual-licensed under GPL and a commercial license.
With the release of QtScript, QSA has been deprecated and will reach its end of life in 2008.[1]