I wonder how much of this is about avoiding collisions. .su would have been Soviet Union at the time. There are a lot of countries that begin with M, so I c

I wonder how much of this is about avoiding collisions. .su would have been Soviet Union at the time. There are a lot of countries that begin with M, so I can see trying to avoid an M code for Hungary. There seems to be some precedent for steering countries away from common letters, if you read the tea leaves in the table (https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2): there are lots of C countries, so Croatia ends up with .hr (from Hrvatska) and Chad ends up with .td (from Tchad), and the S countries are just a mess.