OTEKS software programs can treat the table with peculiarities, complicating the application of many known methods. The tables may be too large, making impossible to load all data into computer memory simultaneously; be badly statistically conditioned (when the number of properties is commensurable with the number of objects);contain different-types features (qualitative, quantitative etc.);miss the part of data (not measured, lost, hidden) partially contain data with occasional or intentional errors.