>>I dont know the reason, but originally it certainly have something to do with some system settings (memory and related). But it has become a basket for all sort of things...
>>
>>You can build a classlib that map all of this functions to methods with "understandable" name and upload it on UT :-)
>
>That is such a good idea, I don't know why no one has come up with this already.

I think it was Christof Lange, who mentioned something like this:

#DEFINE CURRENT_DEFAULT_DRIVE SYS(5)
#DEFINE CURRENT_PRINT_DEVICE SYS(6)
* etc.