[PaulHoule]

You do know that a Word document is really a ZIP file? The text content is inside an XML document that, in principle, Github would work on. All you have to do is unzip the document, store the directory in GitHub and repack it for Word to use.

[acbart]

Wait, wouldn't this actually be fairly simple to set up? I'll admit my Git knowledge is a little shaky, but couldn't you set up a Hook that runs when you commit a Docx/Pptx/etc. file to unzip it in memory first, and then another Hook when you checkout to zip it back into the original structure? I guess conflicts are the major issue... asking users to navigate the XML/binary structure stored inside could be a mess. A GUI could help, but that would invoke different issues.

ETA: Apparently right below this comment someone has already created this: https://news.ycombinator.com/item?id=24303611