All countries in the world are represented by a 2-letter and 3-letter country code based on the International Naming Convention. A similar style of abbreviations is seen for airports, such as LAX for Los Angels International Airport or LGA for LaGuardia Airport. The abbreviations are used in postal services, world currencies, travel, and business activities. The short codes provide a universal and instantly informative representation of each country. Below is each country’s 2-letter and 3-letter abbreviations by region.