A few years ago I worked as a computer science teacher at PTU. And as it often happens, I had a problem group that did not want to study computer science - tractors. And one day one of my students asked me, and why do they, future tractorists, computer scientists? To be honest, I did not find the answer, but one of the students quickly explained that the new tractors have a fuel meter, all the data from it goes to the on-board computer, and that it has long been possible to connect from a regular laptop to it and increase consumption, which will give grounds for the allocation of more fuel that can be melted and sold. The story is not remarkable, but all to one began to attend my couples, and the overall score of everyone grew)))