Transition Graphs of Reversible Reaction Systems.- Communicating Reaction Systems with Direct Communication.- Generalized Forbidding Matrix Grammars and their Membrane Computing Perspective.- Parallel Contextual Array Insertion Deletion P Systems and Tabled Matrix Grammars.- Triangular Array Token Petri Net and P System.- P System as a Computing Tool for Embedded Feature Selection and Classification Method for Microarray Cancer Data.- Evolutionary P Systems: the Notion and an Example.- Partial Array Token Petri Net and P System.- Certain State Sequences Defined by P Systems with Reactions.- On Numerical 2D P Colonies with the Blackboard and the Gray Wolf Algorithm.