Why don the USA and Canada use the international standard for paper sizes (A3, A4 etc)?
Canada has gone metric in the early 1970’s the USA should have gone along with it, but stuck with the old midevil standard imperial scale, however inspite of the conveniënce of the metric system many Canadians still think and use the old standard while the entire country has switched to metric. Old habits are hard to break, I think the US will convert completely in a couple of years from now, but it will take time for the old standard to be phased out. Americans are known to be stubborn and many of them will not participate in converting to metric, and that,s the main reason why the USA hasn,t gone metric yet.
