combustion engines are gasoline (or petrol), diesel, and kerosene. Many people claimed the invention of the internal combustion engine in the 1860's, but only one has the patent on the four stroke operating sequence. In 1867, Nikolaus August Otto, a German engineer, developed the four-stroke Otto cycle, which is widely used in transportation even today. Otto developed the four-stroke internal combustion engine when he was 34 years old.
Arc system. The Arc system stands for Anoxic Respiratory Control system. It is an example of a two-component system, in that it has a sensor molecule and a response regulator. The Regulation of Various Genes
1 An engineered system , is a technical or socio-technical systems system which is the subject of a SE life cycle.  An engineered system context centres around an engineered system but also includes its relationships other engineered, social or natural systems in one or more defined environments.