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The paper develops a concept of a multi-user infotainment system, taking its application in a tourist bus as an example. It has a specific feature that every passenger is able, by means of a personal remote control console, to access the choice of a TV program or play computer games on a general display. Hardware analysis and an example of interface are given.

The article presents a universal multimicroprocessor on-board diagnostic system (UBDS) for on-road and off-road equipment. The UBDS allows to troubleshoot both auxiliary equipment, and control units of mobile machines. The structure of the hardware and the software, main characteristics of the system are given.

Speed measurement accuracy of computers installed on wheeled tractors, not equipped with radar velocity transducers depends on the following: the rolling radius of the wheel to which the speed sensor is connected; the number of sensor's pulses per revolution; and algorithms used for processing the data that arrives from the speed sensor. The work deals with the effect of static tire characteristics and other factors influencing the speed measurement accuracy of wheeled tractors by means of on-board computers. Recommendations are given aimed at accuracy improvement when measuring tractor speed.

The problem of fuel consumption decrease in agricultural machinery may be addressed in several ways. One is to equip mobile agricultural machines (tractors, harvesters, sprayers, fertilizer spreaders, etc.) with on-board computers (BC) capable to measure the fuel flow rate, in particular, which will allow to decrease fuel consumption by these machines due to timely control of the technical conditions of the engine and optimization of the machine operation modes from the point of view of fuel consumption. The article describes a family of diaphragm chamber fuel flow transducers (FFT) for on-board computers of mobile agricultural machines, gives their technical characteristics and laboratory and field test results, and recommendations on connecting them to engines of various power specifications.