Resources are user-submitted pieces of content that range from video presentations to publications to simulation tools.
Spreadsheets and other data related lists that are available for download but don't fit into other categories.
Articles, technical reports, theses, and other documents, usually in PDF or DOC format.
A lecture of some sort, usually recorded with voice or video. It may be a graduate or undergraduate level seminar, a lecture for a class, or a tutorial presentation.
Series are collections of lectures, publications, and other resources presented as a list. Each series is available as a podcast feed.
Supplementary materials (study notes, guides, etc.) that don't quite fit into any of the other categories.
Simulation and modeling tools that can be accessed via a web browser.
A simulation tool is software that allows users to run a specific type of calculation. These are (MS) Windows-based.
A collection of lectures, seminars, and materials that were presented at a workshop.