Open Specifications Poster
This is actually kind of cool: Open Specifications Poster.
The Open Specifications Poster (PDF format) makes it easy for interoperability developers to explore the Open Specifications overview documents for Office client, Lync, SharePoint, Office file formats, and Exchange Server. The poster displays, by functional area, the protocols, file formats, and related technologies, as described in each overview document. You can also view this poster in Zoom.it.