German orthography
Compound words, including nouns, are written together, e.g. "Haustür" (Haus+Tür; house door), "Tischlampe" (Tisch+Lampe; table lamp), "Kaltwasserhahn" (Kalt+Wasser+Hahn; cold water tap/faucet). This can lead to long words: the longest word in regular use, "Rechtsschutzversicherungsgesellschaften" ("legal protection insurance companies"), consists of 39 letters; while the longest German word ever published ("Donaudampfschiffahrtselektrizitätenhauptbetriebswerkbauunterbeamtengesellschaft", "Association for subordinate officials of the head office management of the Danube steamboat electrical services") has 79 letters.
Österreichisches Wörterbuch
The Österreichisches Wörterbuch (English: Austrian Dictionary), abbreviated ÖWB, is the official dictionary of the German language in the Republic of Austria. It is edited by a group of linguists under the authority of the Austrian Federal Ministry of Education, Arts and Culture ("Bundesministerium für Unterricht, Kunst und Kultur"). It is the Austrian counterpart to the German "Duden" and contains a number of terms unique to Austrian German or that are more frequently used or differently pronounced there. A considerable amount of this "Austrian" vocabulary is also common in Southern Germany, especially Bavaria, and some of it is used in Switzerland as well. The most recent edition is the 43rd from 2017. Since the 39th edition from 2001 the orthography of the "ÖWB" was adjusted to the German spelling reform of 1996. This dictionary is also in official use in the Italian province of South Tyrol.