The amount of data in the world and in the people lives seems ever-increasing and there’s no end to it. The authors are overwhelmed with data. The WWW overwhelms the user with information. The Weka workbench is an organized collection of state-of-the-art machine learning algorithms and data preprocessing tools. The basic way of interacting with these methods is by invoking them from the command line. However, convenient interactive graphical user interfaces are provided for data exploration, for setting up large-scale experiments on distributed computing platforms, and for designing configurations for streamed data processing.