Microsoft SharePoint Foundation 2010 is a free low-cost entry-level Web-based collaboration solution for small organizations or departments, and is the underlying infrastructure for SharePoint Server 2010 and the new Windows SharePoint Services 3.0. Frequently SPF is also used as a pilot or proof of concept before enterprise roll-out of SharePoint solution.
"Almost everything about SPF including requirements, what's new, Getting Started, planning, deployment, and operations is in technical library on web and Help format. Similarly technical libraries of SPS on web and in chm format are also available."
Notice in the Help format version, once downloaded if the text in Help file doesn't appear as expected, instead "Navigation canceled," "Action canceled," or "The page cann't be displayed" is displayed, unlock the file: » Right-click Help file, and click Properties » Click Unblock, and then click OK » Double-click the file to open it.