Ahhh, hang on, you mean like a sub-directory of a website?
The OS thing could be a problem as some of the tutorials only work with Chinook (mostly the ones that depend on host mode as there's no easy way to put Diablo tablets into host mode AFAIK).
Also, beginners probably won't know what their OS version is because it's not really mentioned anywhere in the interface. They are much more likely to just know the model number of their tablet, and whether they have updated the firmware.
The approach perhaps ought to be that people find tutorials by tablet model, and are told to update to the latest firmware in order to make the tutorial work. That way they wouldn't have to know anything about firmware versions, merely make sure they have updated the firmware recently.
[Titles: ]Clarity might be more important than consistency. Some tutorial titles lend themselves to "how to" but others don't. Couldn't titles be done on a case-by-case basis?