SDAP
Social Democratic Workers' Party ( SDAP ) stands for:
- Social Democratic Workers' Party ( Germany ), the former name of the German Social Democrats
- Social Democratic Workers' Party, the former name of today's Social Democratic Party - Social Democratic Party of Austria
- Social Democratic Workers' Party of Russia, Российская Социал - Демократическая Рабочая Партия, predecessor party of the Communist Party of Russia
- Sociaal - Democratic Arbeiderspartij, predecessor party of the Dutch Partij van de Arbeid