From the webpage:
This package provides machine learning algorithms optimized for large text categorization tasks and is able to combine several text categorization solutions. The advantages of this package compared to existing approaches are: 1) its speed, 2) it is able to work with a large number of categorization problems and, 3) it provides the ability to compare several text categorization tools based on meta-learning. This website describes how to download, install and run MTI ML. An example data set is provided to verify the installation of the tool. More detailed instructions on using the tool are available here.
As usual with NIH projects, high quality work, lots of data.