#vienna
- Adler — A proper surname of Germanic origin (meaning 'eagle'); in academic contexts, the term refers primarily to Alfred Adler (1870-1937), a renowned Austrian medical doctor and psychiatrist, founder of the school of individual psychology, best known for introducing the concept of the 'inferiority complex' and studying birth order dynamics.
- IAEA — Official Romanian acronym for the International Atomic Energy Agency (known globally by its English acronym IAEA), an autonomous organization within the United Nations system, founded in 1957 with its headquarters in Vienna. Its structural role is to promote the peaceful, safe, and exclusively civilian use of nuclear energy, implementing rigorous monitoring and inspection mechanisms to prevent the proliferation of atomic weapons.
- Albrechtsberger — The surname of the famous Austrian composer, organist, and music theorist Johann Georg Albrechtsberger (1736–1809), renowned for his advanced treatises on counterpoint and for having been the harmony teacher of Ludwig van Beethoven in Vienna.
- Aspern — A historical locality in Austria, situated east of Vienna on the left bank of the Danube, currently integrated into the capital's Donaustadt district; it became famous in world history due to the Battle of Aspern-Essling in May 1809, where the Austrian army led by Archduke Charles managed to inflict Napoleon Bonaparte's first major personal tactical defeat on the battlefield.
- Aubock — A proper surname of Austrian origin, correctly spelled Auböck; it refers to the renowned dynasty of designers and craftsmen from Vienna (Carl Auböck I, II, III, and IV). Their workshop, Werkstätte Carl Auböck, achieved global fame for mid-century modern brass and leather decorative objects.
- Austria — A landlocked country in the southern part of Central Europe, lying in the Eastern Alps. It is a federal republic of nine states with Vienna as its capital, universally recognized for its rich imperial heritage, economic prominence, and Alpine geography.
- Austria-Hungary — A multinational imperial state and dual monarchy in Central Europe that existed from 1867 to 1918, established following the constitutional compromise between the Austrian Empire and the Kingdom of Hungary under the House of Habsburg-Lorraine. Characterized by a unique administrative structure with two capitals (Vienna and Budapesta), vast ethnic diversity, and major geopolitical influence, it dissolved at the end of World War I.