Invited Lectures.- Computational Power of Symport/Antiport: History, Advances, and Open Problems.- Structural Operational Semantics of P Systems.- Some Recent Results Concerning Deterministic P Systems.- Membrane Algorithms.- On Evolutionary Lineages of Membrane Systems.- Regular Presentations.- Number of Protons/Bi-stable Catalysts and Membranes in P Systems. Time-Freeness.- Symbol/Membrane Complexity of P Systems with Symport/Antiport Rules.- On P Systems as a Modelling Tool for Biological Systems.- Encoding-Decoding Transitional Systems for Classes of P Systems.- On the Computational Power of the Mate/Bud/Drip Brane Calculus: Interleaving vs. Maximal Parallelism.- A Membrane Computing System Mapped on an Asynchronous, Distributed Computational Environment.- P Systems with Memory.- Algebraic and Coalgebraic Aspects of Membrane Computing.- P Systems and the Modeling of Biochemical Oscillations.- P Systems, Petri Nets, and Program Machines.- On the Power of Dissolution in P Systems with Active Membranes.- A Linear Solution for QSAT with Membrane Creation.- On Symport/Antiport P Systems and Semilinear Sets.- Boolean Circuits and a DNA Algorithm in Membrane Computing.- Towards a Petri Net Semantics for Membrane Systems.- Quantum Sequential P Systems with Unit Rules and Energy Assigned to Membranes.- Editing Distances Between Membrane Structures.- Relational Membrane Systems.- On the Rule Complexity of Universal Tissue P Systems.- Non-cooperative P Systems with Priorities Characterize PsET0L.