Abstract: The problem of understanding speech is considered as an integral part of the speech data processing. A model of the process of understanding signs is given. A new methodology for representation of knowledge in a computer is described on the basis of the system-object approach “node-function-object”. This algorithm is described according to the lacks of other natural language handling technologies. Also, a linguistic marker is viewed from the point of view of its using in recognizing and understanding the natural language’s sign.