Engineering ideas

??? Engineering  is the use of  scientific principles  to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings.   The discipline of engineering encompasses a broad range of more specialized  fields of engineering , each with a more specific emphasis on particular areas of  applied mathematics ,  applied science , and types of application. History Engineering has existed since ancient times, when humans devised inventions such as the wedge, lever, wheel and pulley, etc. The term  engineering  is derived from the word  engineer , which itself dates back to the 14th century when an  engineer  (literally, one who builds or operates a  siege engine ) referred to "a constructor of military engines. In this context, now obsolete, an "engine" referred to a military machine,  i.e. , a mechanical contraption used in war (for example, a  catapult...