Most people will tell you ISO 216 and DIN 476 are the same. this is not so
The DIN 476 standard has very slightly tighter tolerances than the ISO 216 and in the mid 90s I had the good fortune to meet one of those fancy new printers, under glass, yes, which no longer used continuous form paper but rather it used ISO 216 A4 pages. Or that's what you thought. It used DIN 476. Hundreds and hundreds per minute. The input and output trays were the height of an adult person.
And the moment someone bought A4 which was not DIN 476 compliant things went south. Very, very south. I believe the difference is half a millimetre (!). That printer was not mercifully designed.
Most people will tell you ISO 216 and DIN 476 are the same. this is not so
The DIN 476 standard has very slightly tighter tolerances than the ISO 216 and in the mid 90s I had the good fortune to meet one of those fancy new printers, under glass, yes, which no longer used continuous form paper but rather it used ISO 216 A4 pages. Or that's what you thought. It used DIN 476. Hundreds and hundreds per minute. The input and output trays were the height of an adult person.
And the moment someone bought A4 which was not DIN 476 compliant things went south. Very, very south. I believe the difference is half a millimetre (!). That printer was not mercifully designed.