With respect to the characteristics of conventional methods for setting up the traffic/technological system in air transport and having in mind the very nature of these systems, the advantages of application of the Monte Carlo method have been discussed to create the possibilities for a different high-quality approach to the issue.

This paper deals with an as efficient as possible conversion of energy of human rustles and different types of piston and rotation engines by way of devices given the common name of propulsions, by means of specially designed surfaces which in the process of rotation create an almost maximum driving force. The basic structure of these natural propulsions i.e. surfaces is a curve in the plane which is delineated by the particle of the matter which is due to the rotation affected by the centrifugal and tangential force i.e. their resultant as well as the curve vertical on to it. Research of natural propulsion refers us to the research of natural eccentricity or disbalance in general that may prove of influence on the design of cylinder and electric machines and have further repercussions on the design of different types and shapes of craft and vessel.

By traditional approach and financing models the national telecommunications operator’s list growth rates of typical 3% up to maximum 6% annually. Innovative/business inspected approach and bridging of the existing managerial financial 'gap' it is possible to reach the growth rates of 7-12%. With support of telecommunication policy, more liberal regulations and structured financial infrastructure, telecommunications expansion can mark the rate in the order of 15-20%. · The countries of Eastern Europe have respective requirements and demand for expansion. Some of them take adequate steps towards the introduction of adequate legal/ political regulations and managerial/financial training of telecommunications operators for the materialization of the set-up objectives.

It is necessary to continually coordinate the tariff .system in telecommunication traffic with the engineering and technological developments in the field of telecommunications and the reached development stage of the telecommunications network of a coolly. The paper deals with the guidelines of essential meaning for the structuring of the tariff system being up to the level of Promet, vol. 5, 1993, br. 2, 63-67 the reached development stage of the telecommunications network. The last example of modernization of our tariff system has been discussed in a concise manner to bring it closer to the .systems of Western Europe in terms of making it more familiar to them.

In this paper model of car repair service management is described. This model can be used both for management and control of car repair services, by keeping records of performed works and records of spare parts hand out. System this way enables planning of works and vehicle admittance, as well as precise accounting and generating of various reports.