TDLI makes use of a variety of content for its library systems. OpenCourseWare is heavily sourced for academic content and we include high quality lectures from Harvard, Yale, MIT, Stanford, Berkeley and many others. We source fiction and non-fiction ebooks from Project Gutenberg and several other digital library sources. Hundreds of encyclopedia collections have been donated to the project as well as various vocational training programs, documentaries, language training tools and audio books. From engineering pump manuals to medical books and cosmetology, there is something in the collection for varied environments and interests. Over 25,000 open source software applications are also available via the FreeBSD ports collection, providing a well-rounded variety of tools for different use cases.