The 27th International Conference on Algorithmic Learning Theory (ALT 2016) and the 19th International Conference on Discovery Science (DS 2016) will be held in Bari, Italy, during 19–21 October 2016. The 19th International Conference on Discovery Science (DS 2016) provides an open forum for intensive discussions and exchange of new ideas among researchers working in the area of Discovery Science. The scope of the conference includes the development and analysis of methods for discovering scientific knowledge, coming from machine learning, data mining, intelligent data analysis, big data analysis as well as their application in various scientific domains.