This is a very thorough explanation of what I consider a brilliant paper size standard. What genius to make the aspect ratio identical for each size, and to create smaller variants by cutting the larger one exactly in half.
There are two places where you can tell it's a bit dated though. The first is in declaring the TV aspect ratio as 4:3; it's just about universally 16:9 now. The second is the expectation that the U.S. would be converting to metric, that becomes less likely with every passing year.
There are two places where you can tell it's a bit dated though. The first is in declaring the TV aspect ratio as 4:3; it's just about universally 16:9 now. The second is the expectation that the U.S. would be converting to metric, that becomes less likely with every passing year.