In a cycle of two years, the International Federation for Information Processing Technical Committee 7 - System Modeling and Optimization - arranges highly regarded conferences on several topics of Applied Optimization such as Optimal Control of Ordinary and Partial Differential Equations, Modeling and Simulation, Inverse Problems, Nonlinear, Discrete, and Stochastic Optimization and Industrial Applications. The 26th IFIP TC7 Conference 2013 will take place in Klagenfurt am Worthersee, Austria. The organizer is the Institute of Mathematics at the Alpen-Adria Universitiy Klagenfurt.