This two-volume book contains the papers selected for presentation at the Concurrency, Specification and Programming (CS&P) Workshop. It is taking place from 28th to 30th September 2015 in Rzeszow, the biggest city in southeastern Poland.

CS&P provides an international forum for exchanging scientific, research, and technological achievements in concurrency, programming, artificial intelligence, and related fields. In particular, major areas selected for CS&P 2015 include mathematical models of concurrency, data mining and applications, fuzzy computing, logic and probability in theory of computing, rough and granular computing, unconventional computing models. In addition, three plenary keynote talks were delivered.

The Workshop was initiated in the mid-1970s by computer scientists and mathematicians from Warsaw and Humboldt Universities, as Polish-German annual meetings. The first meeting in this series was named 1st Symposium on Mathematical Foundations of Computer Science and it took place in Warsaw from 12th to 19th September 1976. These meetings have been suspended for some years in the eighties until the beginning of ninetieths, and reactivated in 1992. Since then, the Workshop bears the name CS&P, when the first meeting after the break came into effect in Berlin. Now, it is being organized every even year by the Humboldt University of Berlin and every odd year by the University of Warsaw.

It should be mentioned that the CS&P meetings, initially purely bilateral, since 1992 have developed into events attended by participants from a number of various countries beside Poland and Germany. In 2003 the University of Information Technology and Management in Rzeszow, in 2004, the Fraunhofer Institut FIRST in Berlin, and in 2015, the University of Rzeszow jointed the organizers as full members of the Committee and financial contributors. The present CS&P 2015 meeting will be hosting participants from the following countries: