Here's the best source that I could find:

https://github.com/serbanghita/Mobile-Detect/blob/3b2be1c323d579b36a406d3c54eba5604cea0fd2/Mobile_Detect.php#L143

That's also where I pulled out the regex for the WinRT support.

I'll take a look later on some support.  What I'd **love** is to have a big list of example user-agents and a true/false to determine if they are tablet or mobile.