EN
This paper presents a prototype version of knowledge system concerning the exploitation of a combine-harvester. The system has been elaborated to be an informative help for users making exploitation operations. From the point of view of system tasks, the operational part of knowledge is of particular importance. The presentation of knowledge is based on the notion of the informative ob ject. The structure of such object is defined by a series of attributes describing the operation within operational, control and motivation ranges. The system comprises significant aspects and descriptive and inference knowledge related to them. The solutions worked out were tested and implemented in the form of a prototype knowledge system concerning the combine-harvester exploitation.