When you've been updating your personal details in your dashboard, and had to choose from a surprisingly long list of countries, you were probably thinking how many countries are there.
INTBU, like lots of companies and organizations adopt the international standard "country code" list, formally known as ISO 3166-1. The standard list also includes convenient two-letter codes for each country, like za for South Africa, us for the United States, de for Germany, and jp for Japan, which you might recognize from web addresses specific to those countries.
This ISO standard is based on an official list kept by the United Nations (UN). But then why are there 250 country codes?