Here is the most completed list of all Samsung CSC Codes (CSC means: Consumer Software Customization, Country Software Customization, Country Sales Code).

Samsung may release the same smartphone model in many countries, but each one of those countries has its mobile network carriers (for example, the US has AT&T, Sprint, T-Mobile, Verizon, Boost Mobile, etc.). So to provide unique customization for each mobile network carrier, Samsung makes a special firmware for each of them.