@MontereyJack,
Years ago, when Canadian smugglers wanted to get stuff across the border, they would use crates fastened with robertson screws. Eventually, border guards wised up, but yeah...they're pretty specialized. I don't know if the Europeans, or if anyone else uses them either.
I'm not being patriotic here, really I'm not, but I really wish IKEA would come on board. I hate using slotted screws. lol
And yeah, we get all the cheap Chinese tools too.