Engineering is the practice of using natural science, mathematics, and the engineering design process to solve technical problems, increase efficiency and productivity, and improve systems. It 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 . Some of the most popular fields of engineering include electrical engineering, mechanical engineering, civil engineering, chemical engineering, and aerospace engineering . Engineers are responsible for designing, developing, and testing products, machines, and systems that meet specific requirements and solve problems . They use their knowledge of science, mathematics, and engineering design to create new products and improve existing.