ASCII is easier to figure out than ANSI and thus it remains to be in use. But ANSI experienced a short lifetime and it is rarely utilized now. DIN 476 delivers for formats much larger than A0, denoted by a prefix factor. Particularly, it lists the formats 2A0 and 4A0, https://marcomdsjz.goabroadblog.com/7112394/5-simple-statements-about-ansi-format-explained