This paper introduces the REAKT (REAl time Knowledge Tool) tool-kit from the implementation point of view. The Tool-kit is based on a blackboard model of multi-agent cooperation. The paper will thus deepen into some of its architectural characteristics, leading emphasis on practical issues. A particular C++ REAKT Model of Process Concurrency which makes extensive use of object-oriented techniques such as inheritance and polymorphism will be presented. The distribution of application features over independent processes, and the problem of scheduling periodic, and aperiodic processes in a REAKT-based real-time application will be also introduced. Finally, some figures about the performance of key toolkit features will be provided.