ST — São Tomé and Príncipe

São Tomé and Príncipe is a small island nation in the Gulf of Guinea, the smallest country in Africa by area. Consisting of two main islands and several islets, it sits near the Equator off the western coast of Central Africa. São Tomé city is the capital. The Dobra (STN) replaced the old Dobra (STD) in 2018 as part of a redenomination. For developers, the ST country code and .st domain are notable — the .st ccTLD has been marketed internationally and is used by many non-São Toméan websites, particularly in Sweden ('st' being a common Swedish abbreviation). The pt-ST locale handles Portuguese as used locally. The +239 dialing code covers both islands. Like Mauritania's currency change (MRO to MRU), São Tomé and Príncipe's shift from STD to STN requires handling both codes in historical financial data. The country's long official name with diacritics tests Unicode support in country name databases.