Wikipedia
Tapp-Tarock (Viennese Tappen) is a three-player tarot card game which uses the 54-card Industrie und Glück deck. This is an introductory game for more complex tarock games like Cego or Königrufen. During the interwar period, it was the preferred card game of Viennese coffee houses. Even today Tapp-Tarock is played sporadically. The exact date when it appeared is not possible to identify, but it is likely to have been developed in Austria in the early 19th century. The oldest version was narrated in 1821.
Tapp is a term for the undealt cards in the middle of the table called the talon in other tarock games or stock, widow, kitty, or skat in other card games. Tappu or Tappä is another name for the Swiss tarot game of Troggu and the Stubaital game of Brixentaler Bauerntarock.