Engineering is a discipline that is a bridge between science and technology. It has an important place in the construction of the modern world. With this article, what is Engineering and what are the main engineering branches? We will give you the answers to your questions. Although a very broad and detailed definition comes to our mind with the question of what is engineering, we can say that engineering is the application of science and mathematics necessary to solve problems. Engineers understand how things work and find ways to use scientific discoveries in practical life. Scientists and inventors often strive for innovations that improve the living conditions of humanity. However, engineers make these innovations a usable tool. The history of engineering is one of the parts of the history of human civilization. Today, the pyramid of Giza, Stonehenge, the Parthenon temple and the Eiffel tower stand as monuments of engineering heritage. Galileo Galilei, a famous scientist, was also involved in engineering studies. In addition to his contributions to physics, Galileo also contributed to engineering. Between 1595 and 1598, Galileo developed a geometric and military compass. This compass was used by gunners and musketeers.This device made the ball sharper and safer to use. They could calculate how much gunpowder to put in, based on the type of gunpowder and the type of cannonball. Also, Galileo developed a thermometer. This thermometer works on the principle of expansion of air bubbles in a tube. In 1624, he developed a microscope-like device. Today's engineers don't just build massive structures like the International Space Station. They're also building maps of human genetics and into better, smaller computer chips. Engineering education; It is one of the basic building blocks of the STEM education system, which is an interdisciplinary curriculum that motivates students to learn about science, technology, engineering and mathematics. Engineers design, evaluate, develop, test, revise, install, inspect and maintain a wide variety of products and systems. It also predicts and determines materials and work flow processes, and oversees production and construction phases. Performs error analysis and provides consultancy services. He gives lectures related to the field of engineering in high schools and universities. Engineering science is divided into many special branches. Mechanical engineering, civil engineering, aerospace engineering, nuclear power engineering, energy systems engineering, biomedical engineering, chemical engineering, computer engineering, industrial engineering, environmental engineering are some of these sub-branches. Advice for Those Who Want to Study Engineering There is often significant overlap between different specialties. For this reason, engineers should have a general knowledge and understanding in different engineering branches as well as their areas of expertise. For example, an aerospace engineer must apply the principles required by mechanical engineering, and it should be known that a nuclear power engineer needs knowledge in electrical engineering. In particular, engineers must have a good knowledge of computer applications such as mathematics, physics, computer-aided design and simulation. For this reason, many university programs provide basic engineering education in many different subjects before directing students to a particular field and specializing in that field. According to the Turkish system, in order to become an engineer, you must first get 440 out of 500 in the high school exam, YKS, and settle in the engineering branch you chose. As a result of this 4-year training, you become an engineer. Then you start your business life with job applications.