CommunSENS is a fully scalable knowledge engine based on the structure of natural language and the human communication cycle. Procedural and declarative knowledge can be added, deleted and updated at run time. The knowledge is stored in a universal database. Because of its scalability, the enigine is especially suitable for environments that are subject to permanent change. Building applications in CommunSENS boils down to expanding the engine with new knowledge. Most of this knowledge is formulated in plain sentences. For example, a simple, medical expert system takes 3 sentences. A heavy business rules case takes 70 sentences. After deployment, applications remain fully scalable. The application life-cycle can be extended by updating such an application while in operation. Tutorial, help files, examples and debugger, are part of the system. Check the ToDo form for known bugs.