Microsoft have posted several documents to download for SharePoint 2010.

Download details: Developing Applications for SharePoint 2010

Download details: Microsoft SharePoint Server 2010 Operations

Download details: Microsoft SharePoint Server 2010 Technical Reference

Download details: Microsoft SharePoint Server 2010 Planning

Download details: Search Server 2010 Guide for IT Pros

Download details: SharePoint Foundation 2010 Operations guide

Download details: Microsoft SharePoint Foundation 2010 Upgrading

Download details: Microsoft SharePoint Foundation 2010

Download details: Project Server 2010 Guide for IT Pros

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